I think his lead sound has improved over the years, but his clean sound has moved from a somewhat Gilmore-esque touch to this very chorus-laden one. I wish he explored that old sound again a bit more.
I'll give you a big +1 for that opinion. I think his album clean tones are awesome... but his live clean tone is soaking wet and the effect is too deep for my taste. I can remember seeing DT during the TOT tour and thinking that his live clean tone was better than his high-gain rhythm tone.
IMO, his lead tone has always been spectacular; I remember sitting with my first amp back in 94 and trying to find that tone. It's a bit easier now with the modeling amps.
As far as controversial opinions go, that's about as close as I can get. In all honesty, I agree with those whose state his tone (across the board) hasn't been matched since Awake... with the closest two albums (imo) being FII and BCASL. The last part of that sentence may be somewhat controversial.