Legendary Weapon Changes
legendary is mainly for the skin, you can always transmutate it to other weapons with the same numbers, but in different attributes. So changes are very very slim they change it when there is a solution for your problem.
Arise, opressed of Tyria!
Eventually Legendary weapons will be upgraded to the next level of gear, which is Ascended.
Of course, I have no idea when Ascended weapons and armor will be out, so your guess is as good as mine.
I know that when you transmute a legendary skin onto an (exotic) item it loses its legendary status. The status comes from the stats item. So if they upgrade legendries there is no telling if transmuted items will be upgraded as well.
I doubt transmuted legendaries will be upgraded. When you transmute an item all you’re doing is putting the skin of one item onto a complete other item. So if you put the legendary skin onto an exotic you don’t get a legendary with new stats – you get an exotic that looks like a legendary.
Although in this case Anet may make an exception because of the inevitable kitten storm from people who didn’t understand what they were doing when they transmuted their legendaries.
“Life’s a journey, not a destination.”
Transmuting a legendary, makes it no longer ‘legendary’ class. I believe it adopts the class of the stats you keep, ie most likely exotic. So there’s that…