I agree that Knecht is a better overall player but I think Chaz can come very close to Knecht's production for us this season. He is already taking over games like Knecht did and does it in a way that doesn't leave other guys on the floor standing around and watching.
Milicic has 3 level scoring ability, good ball handling and great passing ability while creating mismatches with his size. Dubar looks like he will be a solid 8-12 point contributor and create size mismatches once he gets fully acclimated.
Add improvements from Cade, Gainey, Mashack's offense, Okpara's physical play and anything we might get from Carr/Estrella and the sum of this team's parts is greater...... overall size, versatility, defense and rebounding are much improved.