Personally I would want all those SimAI recruited bigs off the roster as soon as possible. You will be able to find a lot of players who are better than those bigs next recruiting session. You should be looking for guys who will have core potentials that will get into the 60s (Ath, Reb, Def, SB, LP for bigs) If you want to change your class size look for a JuCo or two next session, but personally I wouldn't worry about it, just recruit the best players. Use your redshirt on one of the freshmen you recruited. I personally try to redshirt the player who will be the strongest in the future, which usually means they have the most potential, but that doesn't always work out. Also at DIII a lot of players will take redshirts without informing them. I personally never inform of redshirt at DIII or DII.