Bottom-line: The mod does not get code work done between the time we finish a release to a new stable release from Oni.
What does happen is that between versions we accept requests and any art work that people want to submit. But realistically, these things tend to spike while we are in development, meaning that all action on the mod will always be condensed into the 2 or so weeks after each major stable release from Oni.
Plus, the hardest thing for us is to get the art work needed, and artists don't really stick around to produce more than a couple things, its hard to get things added.
On the side though, we are working on a decently sized DLC to be added to the game, with full knowledge from the developer. Some of that is being previewed over on the discord, and will only be previewed on the discord until we release an initial version and get that project a thread on here of its own. We simply don't want to have crossover on that here and people asking why that content is not in the mod.
Anyone really really wants to help: submit artwork. Clothes, items, backgrounds, etc.