The idea of Wagner playing some four only arose because Robinson lacks ideal size to play the position for extended periods of time.
If we still had Wilson, there would be no discussion of Wagner playing the four, right?
In the future, we’re going to have three guys (Johns, Iggy, Livers) who can play the four. All are talented. Conversely, we only have two guys to play the five as of 2018 (strong assumption here is that Wagner leaves for the NBA after this year), and neither of those guys has the ability to stretch the floor and shoot threes.
I assume JB really loved having Wilson and Wagner as two bigs who could play together, run the pick and roll, and shoot threes. By the end of the year, we were very difficult to defend, and that was even with two starters (MAAR, Irvin) who were inconsistent outside shooters. Add some consistent outside shooting at the 2/3 (Brooks, Poole, Nunez), and the offense could be elite.