This is some pretty impressive stuff. Reminds me of Star Wars Combine: a full-on sandbox.
That game, still in development (but quite playable, though they don't have "combat" yet per say), has some issues right now that our beloved devs might run into themselves. Namely: there's so much
shit to create and account for.
A couple times a year, the Combine devs release a concept map that briefly lays out the current state of development, and where they intend to go short and long term. It's a valuable tool for their dev team, who use it to both bring order to the seething cauldron of creativity that is their brains and to lay out their dev plan to the (gigantic) community.
It's a pretty big flow chart.
Here's the most recent copy
I highly recommend you (our wisest of dev teams) utilize something similar. Most organizations pretty much require a written plan for any major
creations. The (U.S.) military is one example (OPORDS, for missions). Writers use it, too. Rowling had everything planned out before she wrote, and I personally get at least a vague plan down before having at it.
The checklist is an example of a simple form of plan used in both medicine (see Dr. Atul Gawade's "Checklist Manifesto") and piloting aircraft. Like SWC's dev's flowchart, it's fundamental idea is the same: lay out what needs to be done and what has been done.
This is just my two cents. I haven't played cRPG in like 6 months because of IRL shit, and would like greatly to come back to find a successor game that's just as wonderfully fun to play as the forebear.