I would be in favor of it matching the description if they remove the weapons reflex save/dc check on blindness. If they don't remove the reflex save, change the description to include and raise the DC check.
I have done extensive testing with them and as of right now they have a low dc check to blind on every hit. I even designed a character around dual wielding them.
I agree it is a lvl 8 weapon. But so is a +5 mithral fullplate and that is one of the best armours in the game. Sirroco is a named, unique, and very rare item. It should remain as effective if not better as it currently is now.