I like the shine effect, looks cool. I wonder how adding a small about of gold accents to the armor/tools would look? I'll check out what you updated later, and compair them to the other ones.
As for a discord, idk if it's super worth it cause of how little development is happening with the pack right now. But if more artists star contributing, then it may be helpful just for some fast coordination and feedback.
Edit: also, because I don't have the OG working files for the 3D UI, and don't much like the classic UI, I may just switch the whole pack to Transparent UI for now, untill the rest is updated. I could try to work on the 3D pack, but my Photoshop skills aren't exactly top tier lol
A Discord might spur people to work on it more.