Is everything supposed to be available in the store? Where do you draw the line between what should be available in the store and what should come from one of the other ways you attain things?

It's very hard to say that there's a clear line. This is where a bit of the art comes in, and at some point you say, okay, this is an exclusive item, or this is something that you should only get in the endgame. Or maybe a lot of things, not even maybe, that's going to be a certainty, a lot of things you're not going to be able to just buy from a shop. Because I don't want to make UEC the be-all and end-all of the game. UEC is something that happens to you, helps you play the game, helps you fuel your ship or repair your ship, but should not be the way that you get the most important items in the game.