Lelouch knew absolute power corrupts absolutely.

It consumed his parents, and geass powers caused him a great deal of pain.

Still he played the game to win, and in the end made the right move.

He tried to remove his influence on how the world worked.

He dreamed it could be a better place without geass power.

Was he right or wrong?

I'm guessing we will find out in r3.

They wouldn't resurrect it if they didn't have to.