Seb, bootlegs are really not a great source on which to judge consistency IMO. the quality of them often varies depending on what was used to tape them from where the show was taped etc...
I'm not saying Jon doesn't have off nights he does. I'm not saying he doesn't struggle with his voice at times, he does. But he always has, it's not something new.
The point I was trying to make was that putting that era up on a pedestal as Jon being at his best vocally and/ or the band playing at their best is probably not fair. Were they great alot of the time? Absolutely. But of the six shows I saw on the Bounce tour four of them were also great, one was very good and the one was just a solid performance.
Overall, IMO, Jons voice has been more consistently good since KTF. Alot of the differences I hear now are due to a different style of song being written. Jon's voice range is lower no doubt about it, the high end vocals are just gone, period, but at the SE show last weekend when the mic and sound were working Jon's voice was very strong. He sounded excellent on HAND and much to my surprise they played the original version of Runaway in the encore, taken down an octave and Jon had no problem belting it out. KTF was the final song there and Jon nailed it solid and this is a song I've seen him struggle with sometimes over the years. At the Brew-Ha the night before SE, Jon's voice was in excellent shape throughout the show, he sounded great.
All I'm saying is that Jon and the band have gotten more consistent in the last 12 or 13 years than they were in the 80's when there were alot of very high highs and some pretty low lows at shows. I just think glorifying that era as always being great is untrue and unfair.