It could make sense only if they make some anti-dupe measures, if they don't do that what's the meaning, in few days will see thousends of melee characters teleporting around with there mighty Enigma's.
I've just got my sorc built to my liking and am still trying to get some good stuff before ladder ends, but I think realistically they should reset or rollback after any big dupe spree. I don't think many people would buy duped high runes off ebay knowing that they were about to be dumped back into the non-ladder population. Minimize the demand, minimize the practice.
BOTD and enigma are supposed to be rare. It's just as ridiculous now as it was when every zon had a duped windforce (as I suppose they still do in non-ladder).
Of course, the more logical solution would have been a rollback after the dupe spree, but seeing as blizz never does that, I'm sure they see no reason to reset yet.