More than make a update, make a 60 version and let a 50 version maybe.
but it's still dead anyway even if there an update most players will queue the last front instance, and with the GC restriction ,organize 3 group for a old instance is hard.
I wish some works on Queing [mercenarie system for exemple] and after that maybe get level 60 version of old instance, not an update but a level60 version.