There were a lot of huge plot holes in this film, not the least of which was the physical impossibility of a planet sucking a sun dry of energy while still maintaining enough distance to allow the inhabitants of said deathstar planet a livable atmosphere. Even at lightspeed, the story should have been, "Hey, we're gonna drain this star of energy and blow up Coruscant. Should take about a decade or so. Talk amongst yourselves." And speaking of which, how come Leia weeps and goes wobbly when Han dies, but literally the deaths of Billions of people, many of her military and political friends among them, doesn't even make her blink? This is the second freaking time Leia has watched a planetful of her loved ones die? Is no one worried about her mental state?
As for the whole Jedi thing: I suppose I can suspend disbelief that a novice Jedi, no matter how strong, suddenly knows tricks it took even Luke and Anakin YEARS to master, and I can even believe she can whip the Edward Scissorhands cosplayer via dumb luck and the fact he's a whiny little bitch like his uncle...but I gotta call bullshit on the storm trooper trash man holding his own against "the leader of the knights of Marilyn Manson Fanclub". That lightsaber fight should have lasted about three seconds and ended with a severed limb.
And what fucking meathead thought it was a good idea for sustained evil to literally do the exact same plan that has failed catastrophically not once but twice? "Hey, these rebels are horrible pilots and not particularly well organized, we should gather ALL our military might into one giant, easily destroyable planet death ball. Kinda give them a fighting chance. What could go wrong...again?"