suggestions for bozja QOL

This is really just one thing, but since we're getting all these Bozjan Coins from CEs and Castrum now, could there be some more use to them? Right now you can only buy armor and augments, but it would be nice if you could trade them for the silver/gold coins, fragments, memories, maybe even lockboxes.
I say this because right now I have 750+ coins after a couple days of chilling in Bozja trying to get memories for more relic weapons but only have gotten maybe 20 of each. Probably less than that considering I already had a bit before patch 5.5. Yea, I could just go farm fates outside but... in my opinion Bozja is just so much more fun. I don't want to have to spend multiple lockouts trying to just get enough for one relic weapon.