Haven't had much time to play yet, but do the b-wings and defenders do well against other fighters? The latter really should at least. I'm becoming a bit of a one-trick pony here but I'd really be ok with it if they just made the ISD really good and let the other imp ships suck. It's the one ship that's just too iconic starwars to mess up like that. Well, that and maybe tone down the mass-drivers a bit.
It's also a little sad the game didn't have that counter-unit chart.