It's all to the good that Larian got on top of this so quickly. I write software for a living, so it's a truism that I write bugs for a living too. I'll never ding someone because they left bugs in their software. We all do it.
That said, if QA tested Zombie with the res cap, but the relevant mitigations to the cap didn't make it into the released Steam patch, then it means that QA isn't testing what the studio as a whole is releasing. That's indicative of a process problem. I learned (the hard way) that whatever build QA has cleared, it _must_ be the one released, even with the bugs you hate staying in.
Also, if you're going to release such a huge game change, a specific callout in the patch notes stops whiners like me reporting it as a bug, when it clearly isn't (with the exception re: zombie, potions, spells, etc.)
For me, I just hope that the "Weather the Storm" talent also increases the soft cap, or that's the two talent points on my tanks totally wasted, that should have gone into "Picture of Health"

If there's a bigger rebalance coming along, releasing part of it before the rest might not be the best idea. I'm happy to wait on a larger scale patch which has been thoroughly beaten to death by QA.