Well, I would say not to overreact regarding Bruce's voice, although this performance of 'Ghosts' was indeed a poor vocal performance. He famously doesn't warm up his voice and this a perfect example of why that isn't always a good idea! But I really wouldn't worry too much about that, remember that his vocals on 'Meet Me In The City' at SNL 2015 were not great whatsoever, and the band even dropped the key half a step (from E to D#) on that performance, but he couldn't reach the higher notes and wasn't really in control of his middle range. And still, when the tour began in Pittsburgh three or four weeks after that, the band played the song in the original key and Bruce absolutely nailed it, all the high notes and with great phrasing and he kept doing that throughout almost every performance of that song.
Once he can get back in musical shape with the band, and with proper rehearsals, I do believe his voice will be as good as it has been. For example, that note on 'The Ties That Bind' - he did stop trying to reach it early on in 2016, but he also did the exact same thing in 1980/81, and his voice was mighty fine back then. He began the tour by trying to go there every gig, and then he stopped trying because the note is there anyway sung by the background singers.
This is just my two cents, and I do agree that 'Ghosts' was not a good vocal performance by any means, but 'I'll See You In My Dreams' was beautifully sung and I do believe that's because his voice was more warmed up by that point.