I do agree that Bruss is a starter right now.
He was hurt early in PS last year so never gained any experience. Shelton would start over him now. I think Jackson played equally well at T and G and doubt he sits at all. Boom got off to a bad start last season with Von Miller and was hurt. I think he can be a plus LT.
I see it as NB, AJ, Allen , Shelton, Havs.
Bruss would be the sixth man everywhere except center and Shelton slides to center if/when Allen gets hurt. We may pick up a vet too. I would really-sign NSecke as a back up LT.