The adventure update seems pretty damn awesome, to me.
i know atleast more then 50 things what minecraft should add, but i should just say 5:
1. More mobs
2. More ores
3. fix more bugs, like, Pumpkin (it goes backwards once you obtain it)
4. More recipes for items.
5.More mobs (lololo)
The fact that you mentioned mobs twice suggests that you ran out of ideas, meaning that you don't actually have 50 ideas. So go ahead. Prove me wrong.
Ahahaha- nope.
Painterly looks awesome for 90% of the most screwed-up customizations you make it. That texture pack is pretty bad.
The sand looks just the same.
And the dirt...
And the trees...