Yeah definitely. He relies on his power far too much, and his back-hand is awful. Still surprised he won at Flushing Meadows back in 2009.
He has a solid backhand. I think he can close the gap on the top 4 but unfortunately the one thing he lacks that the other 4 are exceptional at (particularly Djokovic, Nadal and Murray) is movement. He's a pretty good mover for his size and height but the top 4 are a level or two above him in that area. I think he's got a decent game though and should get into the top 5 soon. Whether he's good enough to win more slams is another question, however.
Anyway, the draw is out for Miami. Federer and Nadal have both elected to skip this tournament, with Djokovic, Murray, Ferrer and Berdych the top four seeds.
Potential QF's for top 4 seeds:
Djokovic [1] vs Tipsarevic [7]
Ferrer [3] vs Del Potro [5]
Berdych [4] vs Gasquet [8]
Murray [2] vs Tsonga [6]