You can't really say that this is autotuned. Flanging/filtering/compression can get this sound. And some people don't get the reason why artists do some of these things. It's not always about sounding cool, it's about working with the dynamics of the song and how you want certain things to stand out. And if sounding non-human is "over-producing" every T-Pain song is over-produced. If you know who Roger and Zapp are, that would make their songs over-produced too. Hell, SIB would be considered over-produced, Session, With You, and I can go on and on. So this whole "over-produced" thing is silly.