First of all, I’m happy to see that Antetype is back! It is my favorite design tool, thanks for bringing it back to life!
I’m really interested in what are you planning to build next?
It would be really nice to have a free cross-platform (maybe web-based) “inspector” app that allows developers to see the styling and settings for the elements, check the widgets states, and click through the prototypes.
And I would really like to have something like CSS classes. To be able to change colors, fonts, margins, shadows, and all other properties at once throughout the whole document. Because when the number of widgets grows it is really hard to keep everything consistent.