I'm not a big fan of per-36 stats in general. They represent a hypothetical condition - what a player would produce if he played 36 minutes. Truth is, we don't know. A guy who is used to playing 24 MPG, may get fatigued, or at least pace himself and conserve energy i he has to play 36 MPG. Thomas is an energy guy. Can he sustain that same level of energy if his minutes jump from 27 to 36 MPG? If he does play more minutes, and a assume a greater role on offense, opposing teams will start building their game plan around stopping him, etc. This could negatively impact his per-36 production. You don't really know how a guy will produce per-36 minutes over an entire season, until he actually averages 36 MPG or an entire season.
I prefer actual stats, because they represent EXACTLY what a player actually produced - no hypotheticals or extrapolations necessary. If Thomas was good enough to deserve 36 MPG, he'd be getting 36 MPG. He's not, and he doesn't. It's as simple as that. It's not like the Bulls have some all-star or future Hall of Famer eating up minutes in front of him. If he continues to improve, he'll get more minutes and then we can better judge his actual production against Aldridge's actual production.
BTW, Aldridge's per-36 numbers and PER were better all three of his seasons than what Thomas posted this year. He became a full-time starter his second season and his per-36 numbers were 18.3 pts/7.9 reb/ 1.7 blk with a PER of 18.5 during his second season. Thomas may eventually be as good as Aldridge (I doubt it as he lacks Aldridge's offensive skills), but he's currently at least two years behind Aldridge.
This wasn't the worst trade in Bulls history, or the worst draft, but Thomas and Kryhapa for Aldridge was a bad trade.
BNM