Could we get some work on the Concealed Runes subtheme that UD has? It's really cool, but they way concealing works right now it just conceals the 2 most recently revealed runes, and the support for it is iffy at best. There's a bunch of design space that isn't being used, and it's a super unique theme.
It's a good idea, there are other priorities - like making our established themes competitive - but might be an interesting thing to do in the future. It would likely require new abilities though which is outside of my remit.