Yeah, the Jaime aspect in this was annoying to read. I keep trying to think that maybe it has something to do with his suit or something but what you said makes sense too. I keep forgetting what timeline his story is in BG so it's always confusing.
Sadly, he is also the only reasonable one to argue against the change (especially since he has seen more experience from big time leaders like Batman and Superman). M'gann is too nice, Bombshell and Aquagirl already know what he's like as leader and don't mind him too much, and Cassie respects him too. Static is way too new to know what he's like so it was just Jaime getting the short straw in the end.
But please don't think I accept this, because I don't. I didn't like how Beetle was in here. He is way to nice/relaxed for this. It doesn't make sense for him to act that way, but if I was a writer and had to choose whom to be against all this, he would be the only choice. :\