We had a striker addict for manager, and also you could argue Rooney led the line one of those Tevez seasons, I think, unless you don't count either as leading the line if there's 2 up front.
If Rooney played for Bayern, Madrid or Barcelona he'd be competing with Lewandoski, Benzema or Suarez, not the other starters, in all probability.
People think he drops off too much, but at the highest level, most teams prefer that to a static, stagnant 9 which is why consistent goalscorers like Mario Gomez, Huntelaar and even Zlatan have all been rejected and replaced by less static 9's at one of those 3 clubs.
For next season, we might well be best off going simple, with Rooney as be the 10 behind RVP (and starting at the 9 when Mata is the 10) with Di Maria tucked in on one wing and a new, effective wide attacker on the other, but really, going forward, if we want to be in the bracket with those 3 clubs, which should absolutely be the goal considering our yearly revenue, we need to be better on the ball and less static. That means Rooney up front, where his wandering actually creates space, leaves other team's CB's useless at times and makes us threatening on the counter in the CL and in big games in England. None of those teams would play someone as inconsistent on the ball as Rooney as a 10, or even a 10 at all.