You might be a bit out of luck with some of the expansions. Static told me there'd be no restocks this side of Christmas, and they were out of Y-Wings and TIE Advanceds last time I was in. Annoying, because I kinda want another two Y-Wings.
As for the movement rules, I think that's the beauty of the game. Like in both versions of Crimson Skies, Full Thrust, Wings of War and other games, there's no random mechanics to get in the way of the decision-making. It's all down to you; do you try to line up that obvious shot, or is your opponent trying to lure you into a trap by swinging that other TIE Fighter in behind you? Even if it's not a trap, you still might want to break off and open the range to try to recharge shields or repair critical damage.