Roy needs to own his part in this as well. Part of the issue with the ball stopping has been the perimeter guys waiting on him to establish position and present himself for the catch. Roy is not good at competing for post position and I'd get frustrated with him too. Couple that with the fact he can also be weak with the ball after the catch and it becomes tough to justify making him a big part of the offense as a traditional low box threat. Rik Smits circa 1994 was fricken Robert Parish compared to what Roy is bringing to the table in that area right now.
Disclaimer for the ones that need it: Roy is a top 3 defensive center and an underated rebounder. I love having Roy as a Pacer.
I also think a lot of this is on the coaches. They need to see Roy's limitations offensively and get him his low post looks off of motion and after setting screens for players moving through the lane. Make the guy defending Roy worry about other assignments during the play rather than just being able to focus on pushing him out of position. Would also help the fact that moving the ball in general is a huge issue for this team.
Lot's of people keep saying we need to play inside out. I agree but if that means moving three guys to one side of the floor and trying to let Hill, Lance or PG play catch with Hibbert like Magic & Kareem used to do then I'm out on that deal. 3/4 of those posessions will end up in a bad shot or a turnover.