Changes:
- Removed Slide Cooldown
- Updated Sound FX for reloading a Sicarus
- Added visual indicator to Ogris and Lanka when they are ready to fire
- Added Sound FX for Wyrm Sentinel’s Crowd Control ability
- Reworked some of the pit traps in the Loot Rooms found in Orokin Void levels
- Updated Visual FX on Ember’s Overheat ability
- Updated Visual FX on Trinity’s Link and Energy Vampire abilities
- Updated Visual FX on Ash’s Smoke Screen ability
- Tuned difficulty for Mastery Challenges for Ranks 4+ to be more balanced for a wider range of weapons
- Sentinels will now be revived at the end of a dueling round

Fixes:
- Fixed an issue causing players to not acquire Pickups when rolling, sliding or using a power through them
- Fixed crash that could occur when using Vortex
- Fixed shields not replenishing if damaged while using Nyx's Absorb
- Fixed missing Charge-up Sound FX on various swords
- Fixed dead ends appearing in Dojo at the point where two rooms perfectly connect
- Fixed some collision and AI navigation issues in Corpus Defense missions
- Fixed an issue causing enemies to continue spawning in an Extermination mission, after the count had reached zero
- Fixed an issue with Saryn’s Poison ability, so that the globes now replicate correctly for clients
- Fixed Hornet Strike not affecting DOT from the Acrid
- Fixed an issue causing some traps in the Orokin Void levels to not take any damage from certain weapons
- Fixed an issue causing players to be left in an unresponsive, black screen state when a duel round completes

taken from the official forums: https://forums.warframe.com/index.php?/topic/66795-hotfix-813/#entry704637

That Acrid buff just made it even more of a godly sidearm, as if it wasn't already.

As is usual with hotfixes, there's a lot more undocumented changes than usual, compiled these from a post in the official forums:

Quote :

Lex's trigger guard can now be coloured by "tint colour 4".
Lanka crit chance set to 20%.
Torid crit chance set to 5%.
Ogris crit chance set to 5%.
Ignis crit chance set to 2.5%.
Supra crit chance set to 2.5%.
Dera crit chance set to 2.5%.
Flux crit chance set to 5%.
Kunai crit chance set to 2.5%.
Despair crit chance set to 2.5%.
Reaper Prime components no longer marked as Ash Chassis in foundry description.
New muzzle SFX for Braton, Burston and Torid.
Security Console is no longer re-hackable during the blastshields lowering to cover over decompression.
Torid cloud GFX has been optimized to lower FPS drain.
New Grineer and Corpus death SFX.
New GFX for Ember's World on Fire.
Melee weapons swing trail colour is now determined by the weapon's energy colour setting.
Mission-specific rewards are now forced to display at the front in the in-mission rewards window.

https://forums.warframe.com/index.php?/topic/66999-update-813-unlisted-modifications/page-4

Trinity Link change is so cool.

Edit: WAAAAAA!!! Knives on my avatar!!!