Thor is a Senior. That's 1.
Arop will be gone after next year. That's 2.
Kobe Webster is a 1 year guy. That's 3.
I would wager at least 1, if not 2 of: Stevenson, McGowens (if immediately eligible), King (if immediately eligible), Walker, Allen will leave to pursue pro careers overseas. Most of those are transfers, Stevenson will be 23, Walker will be 23, King will be 22, McGowens will be 21. Most people that are good enough by that point begin to explore their professional options. That's 4, possibly 5.
And that assumes Banton doesn't go pro (> 0% chance) and Ouedraogo comes back for his Junior season (likely but you hold your breath with foreign born players every year).
If I had to guess right now, they're planning for 3 scholarships, understanding 4 could very easily happen this offseason, and need to maintain enough contact with guys that if they have to fill 5 they can.