It'd be kinda neat if they added a little plate accent/background/etc. for all the relic weapons. Doesn't have to be everything for all of them, but a little something to display even if you don't wanna have the weapon glammed.

Zodiac? Kettle sticker.
Anima? Anima minion sticker.
Eureka? Maybe an Ozma sticker.
Law's Order? Maybe a background that looks like a field record.
Manderville? A shiny effect like oil, or a super techy effect like the Mandervillious weapons get.