It's been awhile, but work is still being done.
Main goal of development right now is to make Goshen independent of vanilla CK2 as much as possible, which is a bit of a slog. But that isn't to say that new mechanics aren't in the works. Right now, the Development version has a sword and armor system, you can see in 1, 3, and 4 below(Sword Icons courtesy of Lancelot's Congenital Overhaul mod), that allows you to purchase equipment for yourself or kith and kin.
With that is a pet system, were you can find an animal of Goshen and adopt it, it can then have babies which you can gift out to kith and kin, seen below in 2.
On behalf of the Goshen Dev Team, Thanks for reading :)