I think Brown might just trying to get his starters to gel. With Richardson out for a bit, I think he wants to establish some team identity with his starters and then pull the bench guys in when needed. Otherwise, our line-up is too chaotic, with guys not really understanding their role.
The first few games, our rotation looked pretty good, but then things fell apart. Brown wants to solidify the starting line-up now (or, at least, the foreseeable starting line-up) so we can be more consistent moving forward.