All of the 5* Azure gear is actually very pretty, the problem is that there are so few other armors and costumes that work well with it.
I propose that SK release a prize box with reskinned Azure weapons and shield along with recolored armors as Costumes.
This way you can have armor and helms to match any of the current items in the game.
The only changes to the weapons would be a physical color change, all the attacks, damage, effects, etc. would be the same as their regular parts.
The "azure guardian" line is just an expanded cobalt line, which we see in brigandines and crescent helms. What we could see would be "closed helm" and "ceremonial armor" costumes, and add those to current prize boxes and future ones.
Either that or create a colorscheme to match the cobalt line. Call it the "Azure prize box", and give us standard costumes and accessories.