I'm having the same issue. My 2008 Edge SEL AWD with 18K miles on it began to idle roughly, little hesitation and is running rough. The check engine light came on about 3 days ago. Brought it into my dealer (AutoFair, Manchester, NH) and was told today that it was the camshaft phaser that needed to be replaced.
I was told that the parts were on back order, but that the car was safe to drive. If it began acting up I should call the dealer and they would get me a loaner car to use until they can fix my Edge. Tells me that if the parts are on back order they must be fixing quite a few of these issues.
I've also noticed lately that there is a smell and smoke coming from under the hood especially on long trips. Don't know if this is part of the same issue or not.