No need to publicly announce thar you're leaving the game.

Also, about your points:

1) Yes, MS is kinda overvalued, not gonna argue.

2) Guan didn't get buffed... if anything, he got nerfed. I doubt many people are gonna wait to stack the passive to use abilities or engage, so the bonus effects are gonna be gimmicky at best. The heal, however, is now COMPLETELY meh. Rank 5 heal for 170 with no way to modify it unless you get 30 stacks, and then it heals for 340? No thanks. As I said, completely and utterly meh.

3) About Golden Bow, I'm glad to see it removed. It made most hunters playable, yes... but it also made them run rampant in every game. As support you couldn't even farm safely since you got poked a ton, both by abilities and GB's passive. I was waiting for builds focused on stacking to make a return, and I hope that and the HS change also give a bit more build diversity.

4) Lastly about Merc... He hasn't strictly NEEDED GB for a while now. He's not any less viable without it.