They will continue with nerf patches until they feel they have exhausted all they can do with them. Though when looking at how they have backed themselves into a corner with the Jumpmaster, they may go the 2nd edition route sooner rather than later.
If they have decided to create an X Wing 2nd Edition that would explain the other thread where the distributor claims no more original core sets are ever going to come. In that case what they would do is continue selling the TFA core as long as needed, but rush development of the 2nd Edition, rather than produce more original core sets.