Not anything you are thinking about, more more on the lines of this:
Completing all vICP achievements gives you a Grievous Twilight themed skin
Completing vWGt achievements gives you a Xivkyn styled skin
Completing vSO achievements gives you a Poisonous styled skin
Completing vHRC achievements gives you a stoney skin (like when he turns you into stone or general yokeda)
Completing vAA achievements gives you a runic (runes around your body that are prupley/blue) skin
We need more skins in the game for more things Pve'rs like me can try to achieve. All skins right now, apart from Amber plasm just look ugly to me
Difficulty scaling is desperately needed. 9 years. 6 paid expansions. 25 DLCs. 41 game changing updates including A Realm Reborn-tier overhaul of the game including a permanent CP160 gear cap and ridiculous power creep thereafter. I'm sick and tired of hearing about Cadwell Silver&Gold as a "you think you do but you don't"-tier deflection to any criticism regarding the lack of overland difficulty in the game.