I'm guessing Charlotte putting over Becky was to help build Becky up as a more credible threat? Not my opinion, just my guess as to their thinking.
As far as this whole John Cena thing....I roll my eyes so hard every time he comes out now. You could hear the fans chanting "John Cena Sucks" along with his music when he first walked out last night. Kudos to the WWE, though, so clever....
Our squeaky clean baby face gets booed, so lets give him a storyline/gimmick that fans HAVE to cheer for. Last night was a great example. The crowd hates you, but oh wait, Cena is waving the American flag? "Yaaaa USA, USA, USA!"
If they want to build up Rusev, fine, but there are much better ways to do it than this garbage.