Vince is mad about a star not being as big as what he feels he should be.... yet, when he has talent sitting right in front of his face--DB, Ziggler, Bray, Reigns, etc...he may or may not push them quickly....that doesn't surprise me at all. Triple H and Vince have a bad mindset in general when it comes to WWE superstars: they push whoever is good friends with them. It's all politics and backstage agendas. They think that because Dave sold a lot tickets at one point, he can return 4 years later--out of shape, clearly rusty, and looks like hell--and go over well with the fans? Sure, if it was just Cena and Orton still dominating the entire company and that was the only talent in the locker room, Dave's return would've been bigger because fans would be begging for anything new at that point.
But Dave returned when DB, Bray, Reigns, Cesaro, Punk (when he was here), etc., are all waiting to get their chance to shine at Mania. Dave walks in being all "buddy, buddy" with Triple H and look what happens...The Animal comes in out of no where and wins the single biggest even of the year. Personally, I don't hate Dave when he's a heel wrestler; but overall, I feel that he sucks. In addition, he left the WWE, in the fans eyes, on a bad note. He left quitting like a baby in a wheel chair after getting his ass kicked by Cena and then coms back and loves the fans again? Real consistent...
I know I went off on a spree, but I am trying to illustrate the point that Vince and Triple H are both blind most of the time when it comes to talent. Dave is not The Rock. He can't return at any point and cause an explosion with the fans...he's just not that big. And, most people don't care that much.