It's not hard to be the best diva, and it's not exactly a great feat to be the top dog in that division given the competition, so that counts against Paige.
Rusev, he just has Vlad Kozlov 2.0 written all over him, only difference is that he has a valet/manager. Kozlov got that big push initially (even beat Undertaker if I remember correctly) but we all remember how he eventually turned out.
I'm not a Bo-liever. At least not yet. Something about Bo Dallas just doesn't do it for me. I think he's average in the ring, and I just don't like his gimmick. He could grow on me though, we'll see.
As for Adam Rose, I'm still not happy they culled the Leo Kruger gimmick, as I thought that the man played that gimmick perfect and it had plenty of potential to be over on the main roster I feel. The only reason I can think of is that they thought that it was too similar to Bray Wyatt's gimmick perhaps?
Anyway, the Adam Rose gimmick. At first I thought it was pretty much an amplified Zack Ryder/Fandango gimmick rolled into one. The more I see though the more I get behind it. It's not a great gimmick that has 'future world champion' written on it, but the man is, to his credit, putting everything into it. I think he could do well on the main roster.