I believe they should add a new biome called the forestry Biome that adds singing birds,bunnys and even bears. I think these mobs would be helpful well for sounds, more things to find and its just cute finding them bunnies :D. Also i think that they should add a new tree called the forestry tree. What it does is grow sticks on the sides for a more realistic look, you can break them and get sticks and never have to waste planks again. Also this would be helpful for machinimas and more players to join in on the community.