He does lack the brain of a creative midfielder, but for a striker/forward, he's more than decent. It's just his physical decline restricts his on and off the ball movements, which make him extremely not suitable as a forward for top teams.
The argument that he'll perform better with better teammates is a moot point. Unless he's so special out of norm player, good player would shine regardless of teammates.
The most people can argue is he's been playing on tactics that unsuitable to his strength. It's been proven that some players can excel on certain style/tactic (Vardy, Xavi) or they become the main man where every team movement is centered around them (Riquelme, Pirlo).
Now, the million dollar question is, do you think we should change the team tactic to accommodate Rooney? Is he worth to be the main man for a team that aspired to be one of the best in the world? Does Rooney has the consistency and abilities over a long season and years to come?