I'm out of the office sick today, but I'll make a note to check back with our CS team to see if that's been reported by anyone else. First time I've heard of it at least.
However, while we don't condemn the use of emulators, I don't think we officially support them either. There's so many more things that can go wrong with them that we cannot with any certainty ensure the game will cleanly run on variations of those too.
"Removing beneficial effects" and "stealing beneficial effects" are not a status effects, so Immunity should not protect against it. Situations contrary to that are bugs (we know of some weirdness that can happen with Viking Eddie's Loot, for example; slauki's report of the Assassin Troll being another example).
There's a general issue where talisman augments that trigger status effects for yourself can check to proc multiple times. Because it's not a data issue with the talisman itself, it's not something I can quickly fix, but it is a known issue we hope to get a programmer on soon.
Yeah, I've been wondering how we could make Accuracy Down something that is applicable in new situations; even without relying on passives, they work fairly well if and when you can get the jump on troublesome enemies. While it may not have the potent effect you're describing right now, we do have some new stuff coming that may allow you to do something along those lines in the near-ish future.
I think most people would agree with you there (that's kinda been my thoughts as well), but we've had people explore new high-success rate strategies, and even you yourself have tried some new characters on offense, so as long as new stuff is explored, I'd say that's positive in it's own right.
(But yes, bugs notwithstanding. A major focus of the impending update is fixing some of those bugs at least.)