Animals shouldn't drop so much goddamn food
Biomes should be larger, large enough so I can't run for 5 seconds and reach the other side
Thirst and water bottles or something similar
Biomes should affect players conditions along with weather, eg: deserts make you thirstier or hungrier faster
Hostile water mobs, preferably ones that can destroy boats
fudsfsfhsf testificates the forgets
Dirt with grass on it should burn as well, but not destroy
More variety of weapons and fighting should be improved in general
Materials should be harder to get on harder gamemodes, like longer destroy time and less drops
Bone meal should only make wheat grow, and only 1 level higher
Just some stuff that I think should be improved or integrated into the game