I could come up with a 20 page list but i will try to shorten some into bas groups:
Animals: birds,fish,butterflies,bugs,sea creatues,forest animals
Monsters in general: goblins, assassins, ents, more bosses
More random buildings EG: trade posts,tombs,grave yards,abandond homes.
More food: Fruits,Pies,More cake types, more veg, Bacon
Dimensions: Any other dimension really!
Player actions EG sitting,lying down
Less Lagg
Better texturing to some items
Graphics in general
Some 3D stuff
More furniture
More weapon types EG Bone swords
GOD DAMN EMERALD TOOLS
More ores and gems
More tools: nets,traps
A bed colour for ever wool colour!
I have a load more but im not gunna say it all!