UPDATE 8: Rise of the Warlords

ADDITIONS:

GRINEER GALLEON (NEW LOCATION SET!)
-At last we can reveal the Grineer ships!
-Explore vast, rusted chambers evocative of an amazing space-submarine vibe that exudes the gritty bulk of the Grineer Army!
-The Grineer ships come with new vicious enemies, hell-bent on dismembering any Tenno intruders.
-Lieutenant Lech Kril has been training and this already formidable Grineer boss has new tricks up his sleeve.

OROKIN VOID (NEW SECRET LOCATION SET!)
-An exciting new tile-set hidden within a dimensional fold!
-Players can buy or loot Void Keys to open up exciting loot runs in the Ancient Orokin Towers.
-Explore the hidden fortresses of the Ancient Orokin race!
-But beware, these are dangerous places, fraught with traps and guarded by the corrupted remains of past-raiders!

DOJO BUILDING (ALPHA)
-Brand new tile set with Tenno architecture & design
-New set of possibilities for user-created levels begins with our Dojo Building (Alpha).
-Clan members contribute resources to fund construction projects to build their Clan 'Dojo'.
-Architects have total control of the layout, selecting hallways, junctions and special rooms to build.
-Clan members 'vote with their resources', funding the construction to completion.
-Note: Expect a few bumps as this is an ambitious new feature for Warframe: player-created levels! We will be working hard to smooth out the kinks and pave the way for amazing player-built future of Warframe!
-The Dojo can be accessed by joining or creating a clan. Doing this automatically puts a Dojo Key blueprint in your inventory to craft.

DOJO RESEARCH (ALPHA)
-Clans can build Dojo rooms that open up Technology research options...
-This gives your clan access to an array of deadly new weapons only accessible through the research system.
-Clan members collect research samples and pool resources to fund advanced new weaponry projects.
-Upon completion, members have access to Blueprints allowing them to build never-seen-before weaponry in their Foundry!

DUELING (ALPHA)
-Clans can build special dueling rooms to challenge your Clan members to friendly duels!
-Clan members can watch the action and cry foul... our small dueling team is eager for feedback and have been careful to balance dueling in a way that only affects the Duels.

POLARIZE WEAPON SYSTEM!
-Got your gear to level 30? Prepare to Polarize!
-With the newly discovered “Forma”, you can now add or swap a Polarity value on your gear every time you reach level 30.
-Forma can be purchased or found through Daily Login Rewards, Alerts, or possible Mission rewards for completing missions in The Void.

HUD IMPROVEMENTS!
-Viewing your party’s stats is now a Toggle option instead of Hold key!
-Want to take some fancy screenshots.. WITHOUT the HUD? Now you can!

WHAT IS STALKER?
-We don’t know.. but we’ve heard killing him can garner quite the reward…

NEW WEAPONS & GEAR!
-20+ new weapons added in this update!
-Tenno crafted Kunai (throwing daggers) available in the market for a silent weapon option in your pistol slot.
-New Grineer weapons added to the Market including the Machete, Dual Cleavers, and the lethal Vulkar sniper rifle.
-By popular demand the Market also now has a single-handed Ether Sword, and Dual Broncos for sale.
-As mentioned above, Clan Research brings 9 exciting new player weapons to Warframe, but you need to build your research facilities to discover them!
-Energy weapons, Biological Toxins and high-impact explosives are waiting to be uncovered.
-In addition to these weapons, there are 5 rare weapons to chase in special drops. Who will discover them first?
-New Sentinel Pet available in the Marketplace...the infamous Dethcube!
-Looking for blueprint components to build your Frost Prime? Seek out the Orokin Towers in the Void!

BRAND NEW MODS!

-Sanctuary - Creates a shield around the player when they are reviving fallen allies.
-Reach - Extends melee reach by %
-Master Thief - % chance to unlock locked lockers.
-Insulation - Reduces effect of environment ice on shields.
-Rage - Damage done to your health is added to your energy.
-Melee Channel - Any energy you expend in casting is added to your next melee strike.
-Acrobat - Reduces stamina cost on wallruns!
-Hawk Eye - Pistol zoom
-Eagle Eye - Rifle zoom


CHANGES:

- Ambient FX for Vauban's Tesla ability have been toned down
- Infested enemy types now play reaction to Banshee Soundquake.
- Rhino's Iron Skin ability once again gives push immunity.
- Rhino's Iron Skin ability damage absorption values capped: but up to a damage (d) cap of: 200 d, 400 d, 600 d, and 800 d based on mod rank.
- Rhino’s Iron Skin ability draws Aggro from enemies.
- Alloy Drop Rates have increased and been added as a resource to Pluto
- Recipes for crafting weapons have been adjusted to a lower resource requirement.
- Ash's Shuriken improvements added: it now seeks targets and multiple projectiles added at higher ranks.
FIXES:

- Fixed issue where Vauban's Bounce ability could be used to chain-incapacitate humanoid enemies during their recovery state.
- Fixed issue where some Warframe powers would be available even if you didn't have the mod equipped.
- Fixed misnamed Ash Systems blueprint.
- Fixed some animation event and damage deformer related crashes
- Fixed bug with Extermination Missions not being able to be completed.
- Fix for fused ability mods, it now properly and consistently increases power.

Additional Information:

- "WHERE IS TRADING?" It is still being worked on, not ready for deployment yet.
- Team standing by for bug reports!
- Clan Vault is part of Trading, not yet deployed. Sit tight!



mall 8.0.4.1 Hotfix:

- Added workarounds for "login failed" issues that had unusual HTTP certificate problems.
_____________

Some Hotfixes for y'all:

- Added confirmation when quitting or leaving Clans.
- Option added for larger font size in chat window.
- Only members with forged dojo keys can contibute to Dojos.
- Critical chances on bows have been fixed, (10% for normal, 20% for charged).
- Vauban powers now working as intended. A bug prevented the physics of most skills to work properly.
- Fix for Level 1 enemies appearing in difficult missions in The Void.
- Fix for Reaper Handle drop rate being too high.
- Fixes for various Blueprints not being saved to inventory, including Reaper.
- Flame Lancer and Shotgun Grineer improvements. They will no longer shoot at targets out of range.
- Fixed objective not disappearing for clients on Orokin Levels.
- Fixed issue where Players would get stuck in the Dojo GreatHall
- Fixed issue where destruction of Dojo Elements not working as intended.
- Fixed issue where permisssions for Dojo Roles not working as intended.
- Improved communication cues for Speed Runs in The Void.
- Fix for game invites between Clan members who aren't on Friends list.
- Fixed issues with beam being visible for too long on certain beam weapons.
- Fix for UI Syncronization when other players did contributions to rooms you were simultaneously contributing to.
- Fix for fire effects now showing up on clients until shields are down.
- Fix for Grineer Lancers not shield-bashing.
- Fix for Grineer Scoprion Rope remaining out when she is killed during pull action.
- Lech Kril no longer burns himself with Fire... what a Pyro!
- Various Crash fixes.

Taken from: https://forums.warframe.com/index.php?/topic/49101-update-8-rise-of-the-warlords/ and https://forums.warframe.com/index.php?/topic/50567-hotfix-804-hit-me-with-your-best-hotfix/ in the official Warframe forums.