In order for this team to score more than 21 without the defense helping out are 2 specific areas which need focusing...
Randy Moss and Welker may want to just forgo the long routes and catch 5 or 10 yard outs and do something after the catch and the OL needs to open up gaping holes and protect Cassel as well - Easier said than done but if these guys play with more intensity its possible.
The offense to score more than 21 is not based solely on the performance of Cassel but those around him who need to make better adjustments post-Brady and deal with the extremely raw QB they have in charge now.
IMO There will be VERY few long bombs in games this year if Cassel is to remain the #1 QB and a controlled boring offense is probably the only way this team makes the playoffs.
You're right. As much as I'd like to see Cassel just chuck it up there for Moss and see what happens, you can't just force the deep ball when the play isn't there. I don't care how good Moss is--if they are playing double coverage on him with the safety playing 25 yards off the LOS it takes the deep ball away as an option for Cassel (obviously).
Moss is going to have to start making alot of short/intermediate catches before anyone is going to start getting alot of deep passes thrown to them. This offense is more than capable making ball-control drives and it's still a work in progress.