Well I for one think it would be nice to show some sort if damage, the snow speeders 1st fire on the AT-ATs command cockpit with no luck and then the neck and it explodes.. *woohoo!!"
We see that other pieces fall off as it thunders to the ground, so why not make some action in font as well? Show us how their useless lasers actually manage to penetrate that awesome armor of theirs. Would not be that much work anyways.
Lucky shot? or precession shooting?