Why would you push a guy who may jump to TNA in a month? It would be a terrible business decision.
Ignore his talent for a moment. There is absolutely no chance he will be pushed unless he resigns.
The only reason they would push him is to have RVD resign a new contract, but what's the point if Vince and management feels that he is not main event material, they would rather push Holly or Crapshaw instead of a guy that's actually over with the fans. Is WWE afraid of Rob leaving to TNA? Or they feel that RVD is a valuable asset to SD?