I must state I only played using the Core set pre-built decks yet.
I did give a go to building custom decks yesterday (using 2 Core sets) and I'm not sure how I feel about the experience.
Picking the right objective sets is quite the balancing act. You need to determine which cards you really want, sometimes being forced in using less desirable cards that come along with a given set. You need to make sure you have enough resource production (in the right affiliation), a good balance of cards to use in edge battle and enough units to be able to build up your army.
All that while picking only 5 objective sets (well, you can pick more, but then you are dilluting your deck's focus).
Compare to a game like Netrunner, where you pretty much pick 15 card sets to play (3 copy of each cards), or even Magic where you pick 8 to 10 sets (4 copy of each cards, plus a bunch of lands). I feel like the deckbuilding mechanism in Star Wars severely limits your options. I'm just not sure how good or bad of a thing that is.
My impression is that it will mean that gameplay (and luck of the draw) will be much more critical to success than actual deckbuilding. Although it also means you can build quite a few different decks (not just based on affiliation, but also thematically speaking as well), which may not be such a bad thing (assuming a number of decks are of equivalent strength… I have to presume here that they did their job correctly as designers). Or maybe we'll just end up with a bunch of rock-paper-cissor type of decks (where you can't have a single deck beating all others consistenly).
What are your thoughts on this? Do you see deckbuilding as a crucial element of this game or can you just pretty much throw in any 5 objective sets in 2-of and have a fair chance of winning? (I know, I know… not just any 5, but I'm sure you get what I mean here).