I'm mostly sympathetic with NUMBERICA's views on this, but in the spirit of the OP I'll add a little caveat.
I think we might have learned that if DWill is going to be the outright #1 on this team, then he needs more than just a #2 player to carry the team through the 82 game schedule; he needs a #1a. Part of the problem with this team is that no #2 has emerged, let alone #1a.
Besides a change in the starting lineup, I want the Jazz to work on establishing a solid two-man game with DWill and SOMEBODY ELSE. There is too much democracy happening out there between Al and Sap... somebody's got to step into a more dominant role. I've now seen enough of the Spurs this year to be convinced: you have to be able to play the two-man game during stretches, control the tempo, take over games. Why should a team famous for Stockton-to-Malone need to learn this lesson?
Sap is my man in this scenario. I run a high pick-and-roll with him... let him decide to pop or dive to the basket. Everybody else clear the F&$% out for a second, and make sure that CJ (added to the starting lineup) is camped on the three point line (Hayward, too?). Tell Al that if he doesn't get every rebound, then you're going to cut his balls off.
Otherwise, let the flex do its thing... we're just putting too much faith in it. It's frustrating when it doesn't go well -- resulting in these "pouting" spells by Deron when he can't take the game over for whatever reason.
I've wanted to post something very similar to this but have not been sure just where it would be long and I can be lazy. Very aptly put, hard rep.