Axl sounded fine to me last year at the London show, although I'd probably prefer Jon from 2013 backwards. JBJ 2015 onwards is far worse, and outside of the palladium show (where his voice was fine on the new songs but poor on the 2 older songs) it's hard to judge apart from on YT vids for which the decline is well documented.

It's just weird with Jon's voice, all the way up to and including 2013 it's had varying degrees of quality, but it was still the same voice. From 2015 onwards it declined to the point that it sounds completely like a different voice altogether. Whatever the reasons, based on the last show Axl nudges it over Jon, but yet to feel in the flesh in the stadium how Jon's current voice sounds compared to the WAN tour which was acceptable (on the UK shows at least)