Given that the court case revolved around special treatment given to those beyond a certain age, any solution will have to remedy that issue. Which is why I think they will just move everyone to AFPS 15. Those sill serving and with 75 benefits in the bag will still be able to claim those but they will just have to abandon the grandfather rights for those who were afforded protection solely on the basis of age.
All that said, if Iain Duncan Smith gets his way, State Pension Age will go to 75 and with it preserved pension payments! I can't imaging the Forces working to 75 - 60 already conjurs up images of Dad's Army - so the question will be what to do to bridge the gap. It does in some respects resolve the issue of the pensions trap though if you aren't able to get a full pension til 75, you may as well bank what you have and start again in a second career. That, or it will create competition for service to MEOS at 60 when immediate pensions become payable thus reinforcing the pensions trap for a small band of career personnel.