Off the top of my head, on offense
QB: obvs Shane if he doesn't win the job. And, personally, I'm always in favor of redshirting QBs
RB: Porter. Do we redshirt him with Foreman, Warren, Houston, and Johnson ahead of him? I think we hang on to his redshirt and only burn it if RB injuries force us to.
WR: Reggie? Lots of young WR depth I think: Burt, Collin Johnson, LJH, A. Foreman, Ryan Newsome, Deandre McNeal...I think Reggie might be a candidate. Curtis too. He ran a lot of Go routes on his HUDL, don't know how polished the rest of his route tree is. Maybe a year will help him. Although he does already know Gilbert's offense.
OL: Building depth here, I think Tope is probably the most obvious candidate to redshirt. I think Delance, Okafor, and Shack (and maybe even Aucoin) have a chance to crack the two deep.