Has he every reached his potential? no. Is he passed it? No. He is just very laboured in his play. When Rooney can't be arsed for whatever reason, it shows big time on the pitch.
He didn't make any major runs yesterday, didn't even get in a position to have any attempt on goal. Adnan and Depay made use of any space they could get, Rooney just trotted around the place bar the odd run down the channel to hold up the ball. His passing was poor, underhit, and lacked any real accuracy.
He needs a reality check, I'm sure Louis will echo the same. He already fecked out RvP for under performing, a player he had a closer relationship too. If he doesn't pick it up and make the effort required, it could actually be curtains for him end of the season.
Taking 3 or 4 games to get going is one thing, but dragging your heels and not contributing just takes the piss. His attitude and performance annoyed most of us yesterday.
He is in the position where he wants to be, main striker. He needs put the effort in now asap.