I think dismemberment would be a really bad idea. Mostly because if it happened with any frequency at all to your opponents, it'd also have to happen to you. Well, you say, you could always get a prostethic. But, if you're going to be getting your own limbs chopped off regularly, as well as regularly chopping off opponents limbs, your going to need visiting the medical bay on the Ebon Hawk regularly. Or are you just going to carry around a bunch of spare parts?
Another thing, if we would have limb dismemberment, then most likely also have head dismemberment as well. I don't about you, I don't care to be taken out because some Sith Trooper just got lucky.
Sorry, but the whole idea is silly. So, no.