Junokaii (although I'd recommend not adding me because I'm on literally like... once every month or two)
Have moss in the game for purposes such as decoration, and being able to create blocks such as Mossy Stone Brick, and Moss Stone whenever we want without having to find Mob Spawners, and strongholds in order to find those other blocks.
Vines and moss aren't the same thing. In a recent PC snapshot, it is craftable with vines, but me personally, I would rather see moss as a separate thing. Maybe moss is something that grows on the ground in swamp biomes. It is a quarter of a block high and it slows you down. It grows like grass, covering nearby grass with more moss, until it is half the size of when you pour water and it spreads completely, which would prevent it from taking over the entire swamp. What you get is one moss clump per moss you break. This would be better than the PC thing because now they have something else in the game that can be used as an alchemy ingredient. I have an idea, how about as a potion, it has your health regenerate as fast as it would in peaceful but only during the day when you are standing directly in the sun? That is not too overpowered if it is only when it is sunny and not at night when you would be taking all the damage anyways.