Yes, I know.
In theory, yes. In practice, I had my Kazakus act a few times right after the Voidgill. I mentioned Murky and his summons with no action queued as a possible cause — might have messed up the order like this. For example, Excitement of N’Zoth could probably hit one of my murlocs, then nothing would happen, then Kazakus would summon a golem because he was next in the timeline. This is somewhat contrary to the ability’s description.
That was before the latest big patch, though. Haven’t tested old things yet — apparently, they have broken so much stuff, according to some reports on the forum and elsewhere, that I haven’t been very motivated or played much.
PS They claim to have released a hotfix for some of the new problems, but that’s not all of them: 25.4.1 Patch Notes .
Some are listed there and were reported, but are not in your collection. You’ve listed some others (especially re Mythic), but they haven’t addressed them yet. It’s probably a bit off-topic here, though.