Again, you're probably right. I don't notice it when he's fitting in. It's only when he does something I consider too wanky that it stands out, so it seems like it's all the time because those are the only times that catch my attention. Playing keyboards in a band is a bitch. It's a support role practically by definition, stay in the background and just plays nice pads and chords, so when he gets the chance to go nuts a little, he does. I can understand that.
I think, if you want something that is a bit less wanky, Neal Morse is a good example. He picks really appropriate sounds, everything between basic piano to Rhodes to searing synths to Mellotron, and his solos aren't has crazy as Jordan's, and not because he can't play nearly as well as him (I'll admit, Neal may not be a Julliard prodigy, but he's pretty damn good), but because he also plays what's appropriate for his songs and music.
I think Neal has a good balance, as well, and his solos aren't too crazy, so he's not labelled as a wanky-player like Jordan often is, but they both really balance their roles in their respective bands. However, it is interesting that, as a solo artist, Neal does use the keyboard quite a lot in his solo albums, but he knows how to balance it pretty well with the other instruments (especially guitar), but with Jordan, as part of a group, his solo spot-lights are a bit less spread out - they're more or less inserted, like "here's where Jordan gets to show off for a bit, then Petrucci, then maybe a bit of Jordan again". Neal weaves his stuff in and out of instruments, and then does a focus on one or the other, while DT just, sometimes, pieces together where Jordan gets to solo.
Not that either way is right or wrong, better or worse, just... different.
-Marc.