I don't think this is about a GM trying to force anything on a coach but the moves are going to result in some rethinking of roles and the core line up. We traded our back up PG, our back up 2/3 wing, and Langford who had a lesser but some back up role. We added White (Combo Guard) and Theis (a combo 4/5 big).
Our core 8 was starters plus Schroder, Richardson, GWill, now it looks like it will be starters plus White, GWill, Theis. I think they will play White at both the point and SG so I am not so sure that this changes much for Pritchard. Maybe a little more opportunity.
I think there is more question about the back up wing role that Richardson had. That could be kind of shared between White and GWill but neither is a natural SF and I think that would result in some bad match ups for us. I think the result will be that Nesmith gets more opportunity in that role.
I think this may actually result in less time for GWill. Theis should assume that role as back up 4/5 big or he may even start (although I suspect not). GWill has good versatility which is valuable in a bench player but I don't think he is as good a big as Theis or as good a wing as Nesmith so he may lose out.