So, if we aren't getting a new game, and we're not making new product for the last game, is the property just on reprint life support forever?
I suspect years, at least 5-6 before they would even consider giving up on the license... And if we'll ever see another book for FFG SW, I doubt it at this point. Maybe a second edition IF Asmodee ever gets in a better financial situation and I suspect that's also going to take years.
Now, look at the history of the SW RPG: WEG went bankrupt, WotC choose to not continue the license in 2010, apparently the sales of the RPG and the prepainted miniatures line were not good enough for WotC to extend the license. And they already did essentially two editions... FFG did board, card, miniature and RPG games. They did that in a less congested market, and they did it to increase revenue for a future sale of FFG, more revenue means a higher evaluation (generally).
FFG got the license to SW about a year after it expired with WotC. WotC had already announced in January 2010 that they wouldn't extend the license, I suspect that there weren't many parties that could realistically do anything practical with it, otherwise it would have been picked up far sooner. Before the Asmodee merger they release SW X-wing (miniatures), the SW Living Card Game, the SW RPG, not much after (or even during) they released Imperial Assault (board game), and SW Armada (miniatures).
I would also like to add that FFG has historically not been afraid to drop IPs they have milked dry, examples are the whole Games Workshop license, DUST, DOOM, StarCraft, WarCraft, Battlestar Galactica, and quite a few others. Even in their own IPs, they'll drop them hard when there's no more money in them. As Edge is still reprinting SW books, there's still money in that, and looking at the miniatures/cards side, there's money there as well. Just currently not in making more new books...
Why would Disney pull the license when they get paid the licensing fee? I suspect that the RPG license is contractually tied to the other fields of cards, miniatures and boardgames. So splitting that up would be a headache for Disney. Not to mention re-licnesing a property is going to cost quite a bit in lawyer fees. Currently, as long as Asmodee keeps extending the license and paying on time, for Disney there is no upside. Especially if there's a risk that a new (smaller) licensor might go broke and even more costs for a new licensor deal need to be made. Not to mention the damage to the IP, because a couple of books and then another licensor that again reinvents the wheel is going to damage the IP.