Why do people keep saying this? If someone doesn't like Axe's drumming, hearing more of the exact same isn't going to change anything. Just an observational comment, as comments for or against are rather pointless.
As for the mix, I believe its the lack of room mic's that are contributing to the odd tone, its extremly dry for a live performance.
Anyway, cool video, thanks for posting.
I only mentioned it 'cos I was one of them!..well, I saw him play at the start of the GR tour a couple of times and thought he was sloppy and made a lot of mistakes. Having seen him more recently I think he's improved a huge amount.