I used to post diff to gitlab for just this reason, had links around here somewhere. I don't do it anymore because I just dont have time (I've a day job ;) ) but it really should be part of the standard release. It's not a hard task, just update the repo when the new rev is released so that it's a clean diff of the previous to the current released.
One of the biggest time syncs for me with my dev projects in FGU is the UI methods but the updates and trying to figure out what changed is a big chunk of time as well. That doesn't cover how much time it takes to simply figure out functions not documented (bulk of anything layered on CoreRPG).
Documenting those and improving the other parts is a lot of work but if they'd like to see more community developers it would go a long way to enticing them. Right now there are a lot of systems out there and some of them make it easy to jump into for new developers. I currently split my dev time between 2 hobby projects and I feel like I get so much more done (2x or 3x) when the tools are there for new developers.