This is a feature that the much praised SH3 Commander shipped
and was very wellcomed.
I know that long ago someone was willing to do a "SH4 Commander" since Jaesen Jones was not going into it. I suppose this crew rotation thing would be included, but I have no idea how the project ended, not heard from it for ages :hmm:
Anyway, it could be worth for you to contact those involved as they can provide the info you are looking for. JSCones will probably be able to give you the best advice