I think it’s important to remember how things were at the end of the GW Bush presidency, starting an unjust war, torture, GITMO and so on. The Noble prize was awarded to Obama right away during his presidency to encourage him not to follow the same path as W.
It was strategically awarded and I don’t see anything wrong with doing that. In hindsight, despite extrajudicial assassinations with drones, Obama didn’t start a large-scale invasion like W. did.