Well, Lt. Blount can auto-kill a Stealth Device with an Assault Missile and some of the upcoming releases will bring stuff that really punishes stressed ships.
Keeping Interceptors alive rely on Stealth Device (that usually lasts better than equipping Hull or Shield upgrades) and PTL. Now both are easily countered. I fear that an already unpopular ship will become totally extinct at tournaments. I have been at two store champs. and I was the only one fielding Interceptors so they weren't exactly popular to begin with.
I love Interceptors but I don't think they have much future for competitive play. Imperial Aces changes little in that sense.