I really like KO, but I feel like his ceiling isn't a ton higher than the level he is already playing at. If that is the case it wouldn't be that difficult to replace his current production next year.
If we can replace KO's current production while bringing in a prospect with a high upside I think it a no brainer.
As to who I would pick at 8, Stanley Johnson is my guy. Then again one of the guys in the top two tiers of (Towns, Okafor, Russell, Mudiay, Winslow, Hezonja, Porzingis, WCS) will be available at 8.