His 1.2 TO last year might be a tad bit on the high side, but other than spacing how exactly was he an extreme liability on offense?
He's turnover prone, he doesn't space the floor, he can't handle the ball well, he's not a playmaker (passer), and he's not an
exceptional offensive rebounder. (oops just looked this up he did a good job of that last year)
He's a good driver, but the problem is he typically either turns it over with an offensive foul or gets the the free throw line (where he's below average). Basically he forces things too much.
He's basically a garbage man on offense and you can't be a garbage man on offense when you're 6' 5" and play on the wing.
The only time he was truly effective was in the open court and against teams that would let him get into the lane. Since the C's aren't a fast break team that skill set wasn't utilized much (and he also turns it over on the break to much) and good defensive teams don't give him easy lanes to the cup.
Last year he generated .9 points per possession, that's bad for someone who doesn't get assists. Oh and in 06-07 he generated offense at almost exactly the same rate. Tony is the same player, he just has less minutes and opportunities.