So far, I don't see one.
Your question seems silly to me.
God is all powerful.
How come he wouldnt' be able to make me capable of feeling joy without sorrow?
If He can do anything, then surely he could do that too.
So you're left with God couldn't do it, which means he's not all powerful so probably not God, or he didn't want to which means He is a dick.
A better plan?
Sure. I'd start with abundant energy that didnt' pollute the planet so people wouldn't have to fight over it. Like something better than oil or uranium.
How's that for starters?
How about tectonic plates that aren't so unstable they cause earthquakes and Tsunamis.
I think that would be a better plan.