Better support in general for the basic things in all the math scripts, including numbers for \mathbb, lowercase and numbers for \mathscr, etc.
Once everything above is done, I could perhaps also design more exotic things like \mathcal or \mathfrak for Greek and Cyrillic, or \mathbb support for $\aleph$ and $\beth$.
Darwin should have extensive glyph support for
\mathcal,\mathbb,\mathfrak, etc., including things such as:\mathbbfor the lowercase alphabet.\mathbbfor Greek.\mathbb, lowercase and numbers for\mathscr, etc.\mathcalor\mathfrakfor Greek and Cyrillic, or\mathbbsupport for $\aleph$ and $\beth$.