I think you answered your own question. You definitely need stronger OD.
You could probably use a PG with better passing as well, seeing as your offensive flow is pretty bad. It seems like you're set with your inside scoring and your inside D isn't bad either. Your outside shooters dont seem to be that great of shooters either, so you're a bit one dimensional. If an opponent wants to run 2-3 on you and can still cover your outside shooting, it leaves you pretty vulnerable.
But yeah, the major problem is OD.