I think it's pretty clear that Dave's job is not dependent on winning games *this year*. He got an extension at the beginning of the year that said as much. The AD acknowledged this is a rebuild and rewarded him thusly. Maybe Abrams would be a boost in certain situations, we really couldn't have been any more hopeless on defense than when we went small against GW, but it's clear that he's not part of Dave's future plans. Not really worth arguing about whether he should or shouldn't be playing at this point.
Re: the bigs - Herndon's post was really insightful. They suck right up until they don't. In Paulsen's system, as in most college systems, you don't need your bigs to be scoring machines. You need them to be good post defenders, good help defenders, give you some paint protection, rebound hard, and hit a few bunnies here and there. Relvao and Temara both feel like they're a long way away but they both have the physical tools to be very effective. Temara in particular has shown flashes of fantastic post defense, and his errors seem to be mostly mental. I think the stretch of games he missed in the non-con set back his development and he'll really benefit from a full offseason after being in the system.