Honestly, I have not seen enough of Dastrup, but in the videos I have seen, he
seems pretty mobile and has a decent medium range jumpshot. If this is the case, I keep dreaming of a front line like: (Dastrup-Mika-Childs) or (Dastrup-Mika-KD) or (Dastrup-Kaufusi-Childs), etc. There's plenty of combinations, even rotating in one of the guards when we want to go small. On top of that, we have an outstanding 4 guard rotation with Haws, Emery, Bryant, and Chatman.
We have more options than I've ever seen from a BYU team if everything works out. We even have some decent players beyond these top 9 or so. Incredible.