So, the AMA has posited a few interesting concepts for me.
1. The Rebel and Imperial factions are seemingly being viewed as "complete," with the exception of a few ships that may pop up in future Disney releases. Scum is getting a little more attention only because it is an era-less faction that can capture stuff from almost anything.
1A. This likely means that things like the TIE Hunter are probably never going to happen, unless it shows up in something canon.
2. Card packs are an experiment in allowing the OT factions to grow without new models.
3. FFG considers XWM most viable in the future based upon the newer factions, likely because they need ships. This is where they are going to spend their time, for the most part. But at some point, they will be "full," too.
This makes me think that the long term future of X-Wing is not going to be the models and a new rule set, but rather the ancillary products: card packs, themed expansions, missions, battles-in-a-box, etc.
At some point, there is really no need to produce new ships for a faction unless you retire a similar ship. Like subbing the Squint for the Hunter. Or card packs that just keep filling in the pilots and upgrades possible for the extant ships. No new models, but a greater density of pilots for stuff we have.
How To Play With Your Ships may become more important than Here, Have Another Ship .
Or does the game just end when there are 15 ships per faction, thanks to SKU bloat and perceived completeness?