The inspirations mod has a bunch of nifty features like a redstone arrow, lever torches, glass doors, climbable ropes, bigger cauldrons, cauldron cooking and brewing, locked chests, redstone flint and steel, brick buttons, and more. I think it would be pretty cool to make these features immersive via this mod.

PS: They have a "Making an Addon" page here: https://github.com/KnightMiner/Inspirations/wiki/Making-an-addon