deckbuilding would be the choice of 10 best cards to use in your main deck (10 best Characters/Units) and the rest would be just fuel for Edge Battles.
The above comment just fired my attention for a moment here. I think everyone is assuming that pods will contain one or two really good cards and the other three or four will be just extraneous fluff, Corey of course could perhaps be to blame for putting this assumption out there when explaining the process in the team covenant video when he says something like "if you want Luke, you're forced to bring the other four cards that come with him", implying those cards aren't very good but the game's mechanic for deckbuilding is forcing this on you.
We haven't seen very many complete pods to be able to judge on this properly yet, but I'd just like to suggest what appears to be a very radical point here, and the other four cards that come with Luke will be cards you would automatically pick if you had 100% control over your deckbuilding anyway. If the pods are all meant to have wonderful synergies anyway, then think about what that means for a minute. They work well together.
I feel this will all boil down to a case of "you assume too much".
I've only mentioned one of several POV on this one.
From my POV, since this is a game of combat (you have to attack Imperial objectives; you have to defend Rebel attacks), I would focused attention in getting all the best characters with resource-curve in mind to my deck, the rest is landscape (as in Edge fuel).
This is my opinion from the cards I've seen in the CardGameDB preview. I don't see that much depth in the game, to be honest, because it would only matter who's fighting who.
And honestly, the more I wait for this game the less interested I get.