I think you have missed the subtlety. You will no longer be INVOLSEP so you will want SFA to get CEA. The 50 mile rule will mean they can make you stay at SFA at HQ AIR or PJHQ. If you are already posted to HQ AIR or PJHQ (an dets don't count because your family stays put) you will not move house and therefore you will not be able to claim CEA anyway. As the change also means that entitlement can be withdrawn if you do not remain mobile it means that CEA will essentially be unclaimable if you are an officer who wants a career beyond unit level (ie a series of HQ and MOD tours). As personnel who are only interested in unit level careers will increasingly be limited to one unit anyway - voila, you have effectively removed CEA at a stroke without looking as though you have. The other thing to watch out for is what they will do to Home to Duty (Public). EG having forced you to stay in one SFA and commute they will then also give you less in allowances to help pay the cost.