I agree with a lot of your points Norm,
I think Rivers needs to be playing, he is a glue guy and busts his ass off on the floor. There has to be something going on as to why he isn't playing, and if not, shame on Miles. I personally would have liked to see Hawkins Redshirt but I understand if the player doesn't want to RS you can't make him because the fear of the player transferring. (don't know if that was the case with Hawkins at all)
In regards of Biggs starting... that is on him not Miles. If he would get his stuff together he would be starting, he is definitely playing better right now than Webster, but he is to inconsistent and is having some off the court issues.