Oh yeah I know it’s powerful, I just think challenge is barely a thing in WF anyway so if I play something, it also has to be fun and synergetic a bit. I made the build and will try playing her a bit, always good to have it for archimedea as you said.
I’ve had some incarnon weapons skip an unlocking step and they have the same bug, but I don’t think it actually affects their stats. If you can, I’d say just ignore it?