Not parent but i feel i share some of his concerns: an even better markdown editor would be nice. The current one is better than a lot of others but would love if it eventually supported more markdown concepts.

Personally i have these things that bother me:

* an option for a fixed width font in markdown editor (i like the look of the raw editor but i like the convenience of the markdown one)

* code syntax highlighting

* creating/changing tables with less effort

* very aggressive quoted text styling in light mode

Thanks for making reasonable software. :)