So been reading, and I don't think anyone has hit on this point yet.
I don't particularly fly TIE fighters, and I haven't flown an x-wing in over 2 years.
you had to buy the core set to get into this game even if you didn't want the x-wing and ties.
So i don't understand what your gripe is. Honestly get over it, you aren't thinking about the game you are thinking about yourself "i want this but i don't want that"
As mentioned before you don't have to buy the new core until at least january, and i doubt any tournaments start till feburary given the holiday season.
To put an even bigger dent in your argument the yv-666 really isn't that great of a ship, it's a shuttle that is more expensive and dies just as easily. so I wouldn't expect you mr top tier to win worlds with a yv-666.