I actually saw John Mayer once, when he was operating as the guitarist for Herbie Hancock. They did an almost entirely Headhunters-based set at Bonnaroo around... 2005(?) I was concerned and, while the one song that Herbie urged him to sing was definitely the weak point of the show, you could see him very aware of his place in that group, doing his job, while falling back to support a legend. In that position, he did his part, but it's a lot harder for me to take him in as a frontman.
What you're saying about him being apologetic.. I can see that to a degree. Over all, I, obviously, till don't think we should make too light of those past comments or act as if other people are looking for something to complain about, if they are still upset by them. That interview kind of reflected a guy who believed his own hype and was a real piece of shit. For him to be a success at all, someone like Mayer gets a huge pass for offering some pretty derivative material, putting a pop spin on stuff with a lot more soul and history. Once you start acting like you are some kind of god for doing it, it takes on a different tone. Once you say disparaging things regarding the culture you're taking from, it gets even worse.
In saying that I have an aversion to him in the Dead, I probably should have phrased it more as a continued apprehension.. I have no incredibly strong feelings about it one way or another, and I know people that fully stand behind it and others that definitely don't. My impression is that he might kill it on some tracks, and not so much on others. The early stuff I heard just wasn't jiving with me. I know it's difficult to win that base over. I saw it when they had Joan Osborne playing with them, back in the day, and actually enjoyed it. That was really short lived. I saw Phil's new band a couple of times last year, though, and did enjoy it quite a bit. I liked how they seemed to have the freedom to take those songs wherever they wanted.