this is a tough one, really need to focus on ath, reb, def more in recruiting for bigs. sipe is good at defense - so thats something. after that, its either kinsman or cain, as charles and saul are pretty bad in all major areas (offense, defense, and rebounding). charles is relatively better at offense so backup C should be his spot. i'd probably play kinsman if you need the offense and cain if you have plenty of offense at your guard spots.
but back to recruiting, do you use FSS scouting service when you recruit players? if not, you really should start scouting your local states (up in wisconsin, i'm guessing 3-5 states or so), and recruiting heavily for potential. i can't tell, your guards sort of look like you scouted, your bigs kind of look like you didn't.
i'd really try to focus hard on the cores, and take a walkon or two if that's what it takes to allow you to focus on more talented players. for your bigs you really need to focus on improving ath, reb, and def, and for your pg, defense (ath/spd/def, doesn't need all 3 but a good combination of the 3) and bh/pass (especially pass, that is the most important PG rating), and for your sg/sf, you probably should be focusing on offense there, to let you get reb/def from your bigs and def/guard skills out of your pg... focus heavily on spd/per/bh for your sg and sf can be the same or ath/lp oriented. a target rating of around 70 in the cores is really where you should be shooting for, maybe a bit lower on your ath for your bigs.
going 12 deep is totally not necessary and should be viewed as a luxury for those who have money left over after they've signed quality players to get to 10 scholarship players.