Datamined Mythic+ Tuning Hotfixes on the 9/24 Weekly Reset

wowhead.com:

There have been some Mythic+ tuning hotfixes on the Weekly Reset nerfing Grim Batol, Stonevault and more!

Grim Batol

• Faceless Corruptor Corrupt damage reduced by 10% and pre-cast time increased to 1.75 sec (was 1 sec)
• Twilight Destroyer Twilight Ember should no longer tick instantly
• Twilight Destroyer Twilight Flame can no longer be spell reflected
• Twilight Warlock Enveloping Shadowflame now applies 1 curse per cast (was 2 curses)
• Mutated Hatchling Shadow Wound now increases Shadow damage taken by 3% (was 5%)

Possible Health Changes

There are possible health, auto attack, cast sequence, or other changes to the following mobs (we are unable to confirm these changes through datamining without the servers):

• Mutated Hatchling
• Twilight Destroyer
• Erudax
• Faceless Corruptor
• Scrimshaw Enforcer
• Irontide Raider
• Bilge Rat Buccaneer
• Ashvane Sniper

Erudax

• A new spell called «Depth's Grasp Immunity» was added.
  Wowhead Note: We don't know how this ability will work but Depth's Grasp is the tentacles so there might be some immunity to the tentacles now.

Shadow Wound now increases Shadow damage taken by 3% (was 5%)

The Stonevault

Master Machinists

• Exhaust Vents duration reduced to 3 seconds (was 6 seconds) and the first tick of damage happens instantly
  Wowhead Note: it's unclear if the vents are reduced to 3 seconds or only the ticking damage is reduced to 3 seconds

Molten Metal cast time increased to 3 sec (was 2 sec)

Siege of Boralus

• Blacktar Bomber Burning Tar no longer has damage variance (was 0.01)
• Blacktar Bomber Burning Tar now has a 40 yard range (was 35 yards)
• Bilge Rat Tempest Choking Waters now has a 3.5 sec cast (was 3 sec)
• Bilge Rat Demolisher Crushing Slam damage reduced by 40%

Possible Health Changes

There are possible health, auto attack, cast sequence, or other changes to the following mobs (we are unable to confirm these changes through datamining without the servers):

• Irontide Waveshaper
• Bilge Rat Buccaneer
• Ashvane