Some background: I really like Destiny, but I'm not interested in playing competitively. I just want a cool static deck-construction game with lots of variety that I can put on my shelf and play with my friends and family. To that end, I've collected a complete 2x set of Awakenings. I might get an extra 2x of the Neutral cards so both players can have them, but I don't think I'll be collecting any future sets.
I do feel like the set is missing a few thematically important characters, like the droids, Obi-Wan, Chewie, and Palpatine. Would it be a good idea to buy just a few cards from SoR and add them to my AW set? I don't want to throw off the balance of AW, nor do I want cards that are primarily designed to synergize with other SoR cards.
Are the sets balanced better when played in isolation?
You must do what you feel is right!
Just build a card pool and try things out. You can always set limits…I don't think the individual set is balanced to itself…its really about your individual card pool. I say add cards you like and build decks around ideas you like.