Versioned as a balance patch. TBD on whatever changes yet. Presumably to fix Stukov bugs and re enable him at minimum.
Edit: I'll just say what it appears they attempted to fix since I don't understand the triggers fully enough to say if any of these fixes will actually work. The patch contains bugfixes only, no balance changes otherwise.

* Garrosh Into the Fray (ally toss) should no longer operate as if it were Wrecking Ball (enemy toss) when used within Garrosh's own unit radius

* They changed the Towers of Doom tunnel entrance to no longer block Abilities by making it immune to skillshots, and some other things (e.g. if you saw the clip of the Warhead Junction entrance, which is a reskin of the same thing, blocking KT's stun). Unfortunately, it looks like they forgot to copy-paste this fix into Warhead Junction itself, so it's only fixed on Towers of Doom's tunnel entrance, where it essentially is irrelevant.. (thanks to u/twinklesunnysun for testing and discovering this fix only worked for Towers of Doom, I assumed it would have worked for both)

* Sledgehammer should no longer allow Muradin to complete his baseline quest before lvl 10
* They also updated the tooltip for Muradin's Q (no longer references the quest)
* Brightwing's Speedy Dragon Talent is now indicated as a Z upgrade
* Fetid Touch for Stukov should now change his AA animation to the correct ranged animation (which was tied to the Spine Launcher talent when that existed)
* It Hungers should now reset its stacks each cast of Lurking Arm (rather than potentially retaining 7 stacks toward the next cast when canceled early)

* Various changes to Bio-Kill Switch in an attempt to fix bugs related to Reactive Ballistospores, but I'm not sure how well they work yet. It does not appear to me that they fixed all of the bugs related to it, specifically I have in mind a years old bug (undiscovered or forgotten, until Spazzo discovered/mentioned it again recently) where it deals the detonation damage when the new pustule hits enemy Heroes upon activation (much more noticeable when interacting with Poppin' Pustules). But hopefully they've fixed the new and more exploitable/impactful bug (double healing from detonation with the reset).