If we get Feaster, we've got about everything we need, barring a lot of experience on the Oline.
If we don't get Feaster, someone has to step-up and/or squash the injury bug at RB. King probably has enough talent to give us somewhat of a boost, but that's a lot to asking a lot of a t-Fr.
If we're left with just McClease, Holston, Wheatley, Steward, and Beck, I think the best we hope for is a solid running game. I think that makes this offense pretty good, maybe even dangerous from time to time, but certainly not "lights out."