Every time there is a new release announcement, it seems there is a thread about how the other side is going to suffer in competition. And how many times has FFG proved wrong the naysayers? I say this: Be excited about new cards and don't get upset when a card releases that makes something else seem worse, or that Rebels have more crew or that Empire can always have more ships or whatever your problem is. We've gotten this far, through 3, nearly 4 Waves and several special releases, and the game is still great fun, and is balanced. Yes, they may release a card that gives the opposite side a great counter to your favorite list. Go to a tournament, and see how many people at that tournament played that card. There are a few lists that come up quite often, for example TIE Swarms, Han Shoots First, XXBB, 4X, Triple Firesprays, Interceptor wings, but we still see mixed squads on both sides (which will increase with the next wave). Every player finds a list that best suits how they want to play, and then they perfect the cards and strategy with that list through repeated play with other various squad compositions. The game is balanced and fun, and will continue to be so.
There may be some backfire on this thread about how I am wrong, but I really feel like the designers have gotten it right thus far. There are admittedly some cards that have fallen out of the competitive scene, but there are no cards or lists that are infallible, and neither faction has nor ever will have a clear advantage over the other. You have no reason to think that the game is swinging to favor one faction or list strategy. The factions are asymmetrical strategically, but both have strengths and weaknesses. The factions are equal now, and will remain equal through Wave 4, Wave 5, Rebel Aces, Imperial Huge Ships, and whatever else that this great game has in store for us.
Don't complain, just have fun!