We would have 3 upperclassmen wings Finke's freshman year, and two his sophomore year (maybe 3 depending on how the 2017 class shapes up). This is more about fit than anything else. If we have some roster attrition, then Finke becomes a more likely get, but with the current roster, it wouldn't make sense for either side. Until then, Finke and Illinois have nothing to lose to keep their current relationship as is.
If Finke wasn't a top 100 guy, I would feel better about him wanting to play for his hometown team and with his brother for a year. But Finke is good enough that he can be a bit more selfish about his future and do what's in his best interest. For now, it seems like Illinois can swing for the fences with their 2018 scholarships and that makes it even more unlikely that Finke commits, IMO.
He won't arrive on a college campus for another two years. An awful lot can happen in that time.