This seems to mirror the USAF with its 'base commander' and 'wing commander' - one looks after the hardware/people etc and t'other the operations. Until a few years ago DHFS had a similar split and with everything being packed into a smaller number of bases it might be seen as the way to go.
When I suggested to a stn cdr a while ago that he had hardly been in post anytime at all, he told me that after a 'single cycle' (a year or so) he was liable to move on as there were so few stn cdr slots and lots of budding gp capts who needed to prove themselves.
Old Duffer