I dont subscribe to the midfielders fault for their poor showing, if you can recall RvP's performance level vs Southamption away this season, it gives you an indication of what a forward on top of his game can do, in terms of build up play he was 10/10 that night, shielding the ball, laying it off, creating space with movement... even without his two goals that night and surrounded by underperforming dross RvP's overal game was fantastic, sadly neither he nor Falcao have put in many of thoseetype of displays this year.
Sir Alex last season, we had Carrick & Cleverley in midfield for the majority, and he (RvP) managed near 40 goals to boot, let alone his overal game outside of his goal scoring was on a different level back then,
Yes, I think you do have a point, we could improve our play through the middle, but a forward like Benteke, game to game, would currently offer more right now (leading the line in a 433) than either our superstar, higly paid paring of Falcao or RvP.