Actually Chainz, The graphical representations are all handled client side. So it COULD be possible to have super hi rez sabers. Though in large scale battles, you would be looking at a slide show. I mean 30 Jedi running with 50 sabers(gotta account for many using dual sabers) against 30 Sith with 60 sabers(they all gotta have dual wield right hehe) and that little fuzzy edge won't be so fun. Even with a high end rig you'd still be hurting. Maybe instead of .1 frame per second you end up with 3 frames per second.
I guarantee if you have the option to turn off fuzzysaber for performance, you'd reach for that faster than a dog for a treat.
"I would rather be exposed to the inconveniences attending too much liberty than to those attending too small a degree of it." Thomas Jefferson