It is. If they keep trusting Core devs to do what they promised, they're gonna lose a shitload of money. And that's why this is happening right now.
Wrong. The people who attended the HK meeting have done nothing that violates their "agreement" yet. It was well known that the people were acting as individuals and could in no way guarantee that the presented HF (not yet) would be merged into Core.
Can't do much worse.
Classic developers are like high school programmers in comparison to the people working on Core.
Do you have guarantees that Core Devs will continue to participate after such move?
I'm certain that it is likely that most of them would abandon their 'public' work for Bitcoin. Would you not do the same if you got 'stabbed in the back' after this much time?