What happens is, everyone watching WWE (or anything, really) decides they could book it better. Sure, we don't know everything that goes on backstage, but we can do better, dammit.

Cesaro is great in the ring and I like watching him go. He also has the personality of a stick. It works great in an environment like NXT, where the whole show is about having good matches, but the main WWE stuff is bigger than that, and, regardless of what we would like to see, the people buying tickets to the show want to see what it is they are seeing. The kids want to see Cena be Cena and the bunny hopping around. Dumbass rednecks like to see divas rolling around in their underwear and chanting USA! for no reason. They care about seeing the big spots and the trademark moves, the same way people who go to concerts typically just want to hear the hits.

They could do some stuff better, but there's a place and an audience for what they do.