It's a concern, but if it's still a problem next season, it might make sense to look to the 2018 draft for a starting caliber center. Ayton, Bamba, Carter, & Williams all seem like potential early picks next year that play C.
I'm starting to like Fox & Isaac as my two draft choices this year (with Jawun Evans being my 2nd rounder). If we were to finish in the bottom 3 in 2018, we'd have a shot at drafting Ayton. Then you have this core moving forward:
PG - Fox / Evans
SG - Hield / Richardson
SF - Isaac / Bogdanovic
PF - Labissiere / Cauley-Stein
C - Ayton / Papagiannis
Now that would be a team with some serious potential, length, athleticism, and defense. With Joerger leading that group of youngsters, I would be very excited about that future.