Umm I feel people are exaggerating the arcane situation a bit too much...
Ebon weapons were launched in Winter event (December) Its been 9 months. Marvel was in April, its been 5 months.

Let me translate the issue in simple words: "Some of the players spent a lot of gold in the Elite Awakening Event to get good awakes and they want to continue using the same gear they awakened".

On the other hand what Futumsh explained on how the procs will adjust to player/zone level is logical and makes perfect sense.

I think the best way in between will be to keep Ebon weapons as much usable as the Level 66 arcane weapons were in level 71 expansion [Problem solves]

PS: All previous expansions lasted around a year (they are launched in summer). All weapons were nerfed when level 71 came.
So you knew the drill, you knew whats coming and yet you made the choices, devs didn't force anyone, but its easy to just blame things on others than making peace with your own mistakes.... sad.. isnt it?