Perhaps Luke's newly built lightsaber had a stun setting so he didn't have to kill - after all, that would lead to the Dark Side.... :p
Now if Leia was all feisty and stuff, how did they manage to get her into that bikini...it's not like they took her into slavery and said 'this is your new uniform,' is it?
How did one cannon manage to blow up an entire sail barge - 'point it at the deck'...wouldn't that have just shot a hole in the floor?