This isn't a bad situation either. By the time he comes back (likely a freshman in 2018), we will have the following projected starters:
PG- Haws (Soph)
SG- Emery (Jr)
SF- Chatman (Sr)
PF- Dastrup (Soph)
C- Mika (Jr)
I think it's possible that Frank steps right in and gets significant playing time. I also wouldn't be surprised if this line up gets mixed around and Frank is a starter.