Something I've thought about regarding the 2015 tour is also that the sound of most US concerts feels different compared to the European concerts.
I've never seen anyone agree with me, so maybe it's just my ears, but to me the US sound clearly feels different overall, don't know if they changed details in the recording process or what...
Haven't thought about Mk guitar volume, but probably is. The 2010 recordings were the best in terms of mix, balance, etc...