teeteeinghead's point about the RAF still being commanded by a 4* despite a fivefold reduction in size is, IMHO, completely undermined by the reduction in 4* posts over the same period with the disappearance of the C-in-C posts along with the commands (eightfold, by your reckoning: 7 commands plus one CAS, to just one CAS). One was retained as DCINC Air for a while but went a decade ago. So just one RAF 4* now (unless we're also filling UK StratCom, VCDS, CDS or NATO CMC).
30-20-20: if you were to abolish the 1* FCs, would you re-establish the 1* posts in Group HQs which preceded them? Just wondering whether you think the FCs actually do anything useful on behalf of the AOCs... they are not an 'additional' lower level of command, just parts of the Group HQ which happen to be dislocated from High Wycombe.