I dunno, it's just one of those things. I feel PT being a more profound band than most rock bands out there shouldn't confine themselves to the archetypes of the genre (ie. those hard-edged riffs, which I'll admit, I've never been a fan of... that's why I listen to metal). I think being the more 'enlightened' musicians that they are, they should focus almost solely on sonic explorations and how far they push the envelope there... I definately know I would if I knew as much about production as Steve.
This strikes me with a favourite band of mine too, Stabbing Westward. Their first album had this awesome pseudo-industrial sound to it and they were just doing all this shit with sound... I still can't tell what part of that album is guitars and what's synths, what's sampled drums and what's real. It all blended in to create these fantastic sonic soundscapes. But every now and then they'd 'rock out' y'lknow. And Stabbing Westward's rock parts, no offense, leave PT eating dust... PT don't even touch the intensity that SW had back in the day, especially in the live show.
So I think that's why I'd like PT to stick to what they seem to do best. But it isn't for me to say what they should do with their sound. I can only express what I'd find prefferable.