I personally just think, that's there's barely really great anime being made at all recently, and Maeda, did some freaking nice job recently, you might be right on the aspect that he's overrated, as I tend to think that what he've done is beyond real sometime, there's mistakes like most great anime too, I just tend to think that his work, Jojo's bizarre adventure, Monster, Stein;Gates and the melancholy of Haruhi Suzumiya, is what have been the most grandiose in the past couple of years(though, every character in Maeda's work, is really generic, so the character are a bit unoriginal sometime). But yeah he can be consider overrated as of the lack of originality in his characters.