Leaves should be walkable through.

This would make forest more interesting and easier to travel, I think player should be able to walk through leaves, something like cobwebs, or powder snow, but faster and with inconsistent speed, to feel like crushing branches (with crushing sound effects), maybe if you would go too fast, like on the horse it could deal small damage, something like branch smashing you in face (But also can by avoided by wearing helmet),

It should not reset your fall damage, something like lava does, maybe just reduce it by some percentage. I think this would make travel really easier and add something new to the world that we are so used to.

It can be used to cover traps or holes, make bushes that are not just obsticles, or let players to hide in them, maybe let some mobs interact with them or hide in them. It would also make Horses and Camels more useable in forests, because right now they are just very annoying transport in case of jungles and forests.