As an example of the work that's going on, I just did an editing pass on Kits today, and the file has been updated with the latest here. This has not only a bunch of Mini-Kits with advances for you to take outside of the main kits, but also includes Reputations, which allow you to have greater influence as word of your deeds spreads.
I'm also happy to post up a schedule for mini-expansions here.
September: New Class: The Rogue
October: Urban Fantasy Skin for the sample Adventure
After that, I'm thinking of putting out a collection of "magic systems" with different feels, as well as working on more new classes: the shieldbearer was a popular pick, so it will probably be next.
I'm also very excited about this Fall's X-COM 2 release, and with that in mind I have started sketching out ideas for UFO Strike! This will be a version of Strike specifically made for fighting aliens. It'll be great for playing in a world like that of X-COM, but it'll also include other fun variations like playing as the aliens. This project is larger than a mini-expansion, and if things go well, you can expect this to be my next major release. First things first, though: I have to get the core book done and out the door before I start putting time into the next thing.