leia may be a ziltch jedi but she did help luke defeat DE sidious, disrupting a force storm, her child helped as well, how can you say she was a jedi for five minutes who cares, luke was a jedi for what, a few months he was never trained as a boy for years and years like obi wan, or even dooku, or sidious, or even darth maul, he was trained for little while by obi wan then for a little bit by yoda, it seems that since he is the son of the one the entire skywalker bloodline has incribible power, skywalker surpassing vader since we cant ever see vader at his full power, i guess he does suprass vader even at full power, cause vader didnt learn how to fight that good till he was alot older, while it took luke a lot less time, i think leia being related to luke and vader can probably do some pretty fancy tricks even though she has little training, on wookiepedia it says luke has unlimited aptitude or something like that i think leia might to, hell even her unborn baby helped defeat DE sidious and thus might have this unlimited apptitude as well, this newest skywalker also seems to have such apptitude being amazingly strong.
beside the skywalker line, sidious learned all these new tricks when returning as the emperor reborn, his lightning could kill you instantly tearing right through you, i dont know if he could always do this but i never heard of it doing that till now, the force storm is two moves actually just with the same name but there totally diffrent one is playing with time and space opening worm holes or tears in time and space, it destroyed an entire fleet, pretty strong stuff, the force storm is an upgraded version of force lightning also from wookie pedia, able to hit more then one apponent.
moving faster then the eye can see how fast is this well windu can fight that fast, i think in ROTS it was shown that sidious is pretty darn fast even at his age, he killed two jedi masters even before they had the chance to defend themselves, then he fought mace and fisto at the same time being to fast for fisto as well and killing him, for all we know he was moving faster then the eye can see, and whats the diffrence between leia's eyes and ours, if she says they moved faster then the eye can see im guessing that means most normal eyes, not jedi eyes, it was stated by someone else that luke moved so fast it was like 20 sabers moving at once yet we know it was only one.
sidious wasnt the only one to destroy sabers from the hands of there holders, dooku did the same to ventress during there fight making her sabers fly out of her hand then destroying them, sidious is way above ventress and dooku and even his former self this sounds like a nifty trick.