The ideas I have, since I'm probably not gonna get to use them, are
- Steve can jump significantly higher, but Elytra is replaced with a non-recovery up special like Jigglypuff's sing (not sure what)
- Crafting creates exactly 3 blocks, which can be either a ceiling or a wall - walls give Steve a little extra height. Crafting again will erase those last 3 blocks
- You can get a tiny bit more wood from mining steel and vice versa than you can in Ultimate
- Crafting tables can only be summoned after they've been destroyed. This doesn't apply to scrolling stages
- Crafting will use your most powerful material (not including diamond or gold) first instead of your weakest
- Steve's animations remain intact, but he gains extra pixelated motion blur FX to make his attacks easier to read, and will flash redder than other fighters when in hitstun both as a Minecraft reference and compensation for sharing an animation with walking
- Redstone doesn't exist - you have unlimited string for TNT and Minecart is in a middle ground speed
- TNT doesn't flinch when hit