No is the short and sweet answer. They would need to change their architecture to get near Nvidia in terms of energy efficiency. The driver roll-out is just a bandage.
You beat me to it, I mean why wouldn't you take a free upgrade to a better OS. I think that's why it's so late. They've all been trying their best not to be the one writing it.
Lots of options but I've got to go for Fallout (although I might be influenced by the fact that I'm playing 4 right now).
The very definition of open play as it is totally up to you how you play the game.