No, I'm not too concerned about the depth up front. Injuries could hurt us up front, but there's not really a position where that's not the case.
It's not uncommon for a team to need a redshirt freshman to play a backup role. That happens all over the place. So if our starting four could stay healthy next year, then I don't see it being a big deal.
As far as I'm concerned, you've got Van Bergen, Martin, Washington, and Roh to start as your first four. Jibreel Black is another viable option. And then you need Ash, Talbott, Paskorz, and/or Wilkins to play.