It would be very helpful to me if there was some form of API to access roll20 itself, rather than the 'internal' API in game. For example, I would love it if i could write my 'internal' API scripts in an editor I am comfortable in, using tools i am comfortable with and have a build script upload it into my campaign. I would also find it really useful for managing items in the journal, especially when I have a lot of information to insert, it can get tedious to create a new handout, copy/paste the info, save, create another handout etc. I'm sure there are plenty more uses people could find for this, not to mention integrations with other tools that would take running games on roll20 to the next level