*Eubanks- Might leave because he's not good enough for high major basketball. He's a role player at best for us (with a decent guard roster that is).
*Vila- Might leave because he had a terrible year. Was highly sought after to play on teams in Europe (maybe not as much though after this year). May decide that's the better route now while they still want him. He has the physical tools that no doubt Billy K will still want to keep him if he can.
*Trocha- Obviously NBA is not an option. Pro ball somewhere is a very good option (especially since he's not American- South American leagues prefer local guys). Sure he can stay here and play at his natural position again (assuming Williams is gone), but he can go play at his natural position overseas and get paid. He's already 22 or 23. He does seem to really enjoy being an Aggie though.
*Williams- Appears to like being a college student. I just think there's too much $ on the table for him not to go (us sucking this year doesn't help our case for him to turn down the $ for one more season).
*OP forgot Caleb Smith- If he has any other options, I say he gone. Can't even beat out 2 walk-ons. That said, not sure he actually would have D1 options to switch to. If we do trapdoor kids, this would be it (if we need the scholarship).