I listened to a couple of 2011 bootlegs recently and honestly, he was pretty rough through a lot of that tour. But that said he was definitely worse in 2014, straining a lot even in relatively mild songs like Wasted Years. But with that said, I would argue he was worse in 2016-17. He could hit the notes pretty well, but he just sounded consistently out of breath in the higher notes. It wasn't bad necessarily, but different and the result is that his voice sounds less full overall.