You're taking this too hard against Usopp. It isn't that big of a deal that he executed. Sure, you called Tris out as the scum King but you gotta give props to Tris for making Usopp town read her in the first place. He's not a dumbass for that. Besides, you were scum. You would say anything to survive. He has no reason to believe anything that you were saying. He has no reason to trust you. From Usopp's perspective, not executing you would have been a stupid move. It only doesn't look like that because you have hindsight and now know that Tris was the evil King.
No, they weren't lmao. With the exception of the King, the Unseen was the same as last game. The Reaper role is dope but it's power got overblown and the remaining indies didn't add much.