Ignatius, is this good or bad?
As far as losing Cromwell as OC, I don't think that will matter much because Mike Sherman has always called the plays, anyway. Plus, Cromwell was not known as a good recruiter (he's always been an NFL guy; this is the only college job he's ever had) so it's not like we'll be missing him there, either.
The only thing that concerns me about losing Cromwell (who was also WR coach) is that our wide receivers as a group have been playing at a higher level the past two years than at pretty much any other time in our history. Granted we've probably got the most talented group we've ever had, but one of our leading WRs has been Ryan Tannehill, who is also the backup QB and never played WR until his freshman year at A&M. Cromwell certainly had a hand in teaching him.
Supposedly Steve Kragthorpe is interviewing for the OC/WR coach job (or possibly just the WR coach job). The latest speculation I've heard is that there may not be an OC at all, but instead QB coach Tom Rossley will be the passing game coordinator and RB coach Randy Jordan will be the running game coordinator.