so "balance" is having the jedi having all the power, and no sith opposing them?
sounds kinda one sided...
the only way you can have "balance" and still have a powerfull jedi, is to have a sith opposing him.
and it was balanced in the old movies cus
a master and aprentice.
the emperor and darth vs yoda and obiwan,
and eventually yoda and luke, till the final movie where darth and the emperor are killed and luke and the sister are left. making it unbalanced again.
i also remember the emperor saying that he will soon have an aprentace that in time would become even more powerful than himself.
so i think darth is the chosen one, and balanced the force by killing most of the jedi, who had the advantage.