For the cost of Ascended gear (including the cost to get to 500 in the respective crafting profession), the benefit is not really all that incredible.
There’s been some admission from ArenaNet that they acknowledge this and have considered allowing stats to change like Legendaries.
I think this should be done for a variety of reasons.
First and foremost, it would give many people a legitimate reason to craft one.
There’d be a clear advantage over a locked-stat Exotic item.
You would be able to change your play-style at will.
On top of that, I think Ascended armor should have each “armor” get slight modifications. Maybe Celestial/WupWup armor would get some sort of rainbow aura or sparkles… Another armor could get flames, etc. One could look more metallic.
This would provide definitive reasons to craft each armor. There’d be visual distinction. (Like how Ascended weapons currently have different coloring depending on what the stat combo is.)
The purpose of Ascended crafting is clearly to provide a material sink. But there’s no benefit to crafting multiple Ascended armor sets. They all look the same.
Moreover, I think that Legendaries should receive one more additional benefit (to compensate for Ascended getting improvements)… Being account bound.
We get an icon on the character select screen promoting how many Legendaries we’ve crafted… but why should they be limited per-character?
If not directly making Legendaries account-bound… Maybe add a Gem Store item that would give the same effect. “Use this item to make any single soulbound item permanently account bound for use by any and all characters on your account.”