I would have agreed but its not just Obama to be blamed but presidents before him too. Drones are really the most coward weaponry to be used at war. The government won't have anyone to answer while killing, as there will be never an American life lost at war using drones.
The world expects more from the US. But I think its not the American people but just the capitalists controlling the decisions.
Drones are cowardly. But look at the options which are tabled before the American President. Manned missions increases the risk of casualties, and this can provoke strong political reactions back home. Using unmanned drones makes sure that there is no casualty on the American side. So there is no pressure from the public back home. And increase in the civilian casualties on the war-zone..... well that doesn't matter. At least as long as those who are being killed are non-Americans.