Since 87% of the US's oil now comes from outside the Middle East (
thanks Alberta!) I'd like to pay 13% more at the pump and have no further American presence in the region.
3rd parties don't solve civil wars. Most Jihadis are created when Western powers bomb wedding parties by accident, or kill somebody's jackass brother. Iraq was invaded for no reason, and the Iraqis know it. They're pissed at the US, but even more so at each other.
Stop propping up oppressive regimes like Saudi Arabia, allow the region to redraw its own maps, and who knows... You might start seeing peace break out. Extreme groups like ISIS don't tend to last long once people figure out they can't actually govern.
In any case - oil used to be the compelling argument for staying in the region. It's far less so today. Time to pack it up.