Agree with the OP, even though I don't have as many issues with the snapshotting.
The snapshotting is a very dated mechanic that feels bad to play around, full stop. You can play around it, and it's workable when you get used to it, but it's gotta go. It makes PvP a joke, and PvE feel sluggish and unresponsive at times. It makes playing the game feel considerably worse than it could be.

Unfortunately though, I feel like their focus is on simplifying the game (looking at job design direction), removing more and more difficulty and nuance. So maybe it won't be a problem when there is no more challenging content worth doing.