Jedi can fly in any direction for a limited time and jump to and from superhuman heights to reach basically anywhere. one jedi alone has enough force power to push at least 3 driods away or manipulate/damage something important. so imagine what 200 combined could do? move something very big anyway.
The thing is, lucas doesn't think about these things. he thinks "oh wait, I forgot about putting an action sequence with lots of jedi in battle together, i'll just put them in an arena and make them get their asses kicked till they're saved by mindless clones, totally ruining the mythisism of them from the originals". "wait, ill have yoda fight, it'll ruin his character but it will be a cheap thrill for out action seeking audience", even though yoda's so powerful he could destroy anything that threatens him, even a sith appenctice - so the logic of someone like him fighting or even taking out a lightsabre is pretty ridiculous.