As listeners we are not "entitled" to be treated with respect, but it sure goes a long way in keeping us as listeners and keeping listeners in the loop of major shifts in the show is what I would call respectful. The show on Mule is a different show now, JG is trying to own it and do his own thing with it and there is nothing to criticize there, but it does show a lack of respect for the existing listeners to not at least hint at the changes and give the other host a chance to sign off for the listeners and close the loop. It's not right or wrong, it's simply a choice, just like the choice we make to listen or to leave comments etc.
I am grateful to Dan for filling in the blanks so listeners are no longer distracted by it. I think it's critical to note that he did a masterful job in phrasing it so as not to generate any animosity on the part of the listeners (or between himself and JG) and that's probably the most important aspect of what makes what he did "respectable" versus something to criticize and/or dismiss as a PR stunt.
private: what the partners said or didn't say to each other, dynamics of their relationship
good taste is to use all public info as pr, bad taste use private info as pr.
I listened to dan's special again, something just doesn't sound right about it. he wishes john good luck but then implicitly blame's john for not doing one last goodbye show. this is where the (implied) private stuff comes in, who knows why john didn't want to do one last show, maybe john's just an asshole, maybe dan was an asshole and john doesn't want to see him, maybe they're both assholes, who knows. i don't, that's private. so dan should've kept those speculations out of the public ears, but instead he frames john as the guy who didn't feel like he owed it to the fans to have one last show, when the reason for that is probably private. sorry, something just doesn't sit well with me about that.
But when something IS public, responding is often necessary and I stand by my comment that his response was a perfect example of the right way to do something difficult with class and aplomb.
There are a lot of rumors and Dan just rightfully is trying to put in a final statement so that he and the audience can move on. It is customary given the abrupt change in programming and it shows proper respect for the audience.