This is confusing. Why do you keep bringing this up as if it was the coaching staff's plan to play a 6-6 post? KD left the cupboard bare. We had 3 eligible bigs, and two of them got hurt. The third was a freshman. Unless you're on a steady diet of Duke or Kentucky, you rarely see freshman bigs who are any good.
Next year we'll have 4 bigs on scholarship. On a roster of 12, 4 bigs is plenty. Beyond that, one can only speculate how injuries +/or development will play out.