I'm pleased to see some honest discussion going on about the once holly "everyone should have two Core" doctrine. The game has changed so much in just the last year that this is quickly becoming untrue. Even for those playing in tournaments, 1 Core gets you in the door and your money is better spent else where. The second Core makes way better sense for the Imperial leaning player, thanks to those two ties, but not as much for the Rebels.
The Core, as it is today, is still a great deal and a complete game in and of itself. I doubt FFG will replace it. It keeps the price point down and "mistakes were made" can't happen if the initial price is too high.