Make Survival mode harder and add a Casual mode

I propose creating a separate mode featuring more realistic survival mechanics, while renaming all existing Survival worlds to "Casual"

You would be able to convert your world from Casual to Survival mode within the game

In addition to complex mechanics like thirst and temperature, this mode would feature altered game physics

Torches (standard, copper, and soul) go out over time or in the rain and require a flint and steel to relight

However, torches now burn away the block directly above them (literally consuming the block, not just setting it on fire)

If you coat a torch with glowstone dust, it won't set things on fire, but it will still go out and require constant relighting

Redstone torches coated with glowstone dust act as lamps: they light up when receiving a signal and go out when the signal stops

The only torches that stay lit indefinitely are the glowstone-coated redstone torches

Lanterns and lamps also go out; the exceptions are glowstone and prismarine

New fire mechanics: fire now ignites and consumes wood blocks, turning them into burnt or charred wood

Water now flows away when placed; it spreads in a straight line for exactly 8 blocks, forming a thin layer at each step. It no longer breaks your fall

In other words: 1 bucket = 1 block of water

However, falling into water that is 2 blocks deep will still save you from fall damage

Water & lava generators can be obtained in the new "Steve Dimension"

Nights are now dark, and sleeping in an uncomfortable location causes nightmares