The more informed could tell me if I'm wrong, but I believe Dillon will play because he is physically ready. He will get some minutes and experience so we have an extra guard with game time experience the year after. Brook-Harris will for sure RS and I believe George might also, unless he manages to really bulk up this summer. I believe DD RSs more for body development, rather than skill development.
I think you are right about Dillion. Since we are losing 3 Guards after next season it probably makes sense for DD to get Dillon some PT next season to be ready to contribute more the following year. Needs to be some ready-to-go Guards to replace Elmore, Burks, Watson when the time comes. Unless DD wants to go 10 deep looks like George may be RSing next season to get bigger/stronger.
2018-19'Guards - Elmore, Burks, West, Watson,
DillonForwards- Penava, Bennett, Williams, Cook