Interceptors have a lot of viable characters in soontir, turf, jax, royal guards...
It's just that the turret rules are so overturned/under thought that they're all waiting on auto thrusters
As for whether or not the x wing should be the work horse, the game doesn't have to stick to the fluff 100% nor should it be a priority over the needs of the game itself.
Overall, the x wing is a solid ship with a lot of solid options available. Any supposed fixes for it would only come well down the line, because there are plenty of other pilots in more dire straits even after the advances needed fix (Knave).