I haven't heard the meta yet but I found the original LS50 to be fatiguing because of the extra energy mostly around 2k, I applied a few filters based on the Soundstage measurements to make them more neutral and they were amazing with no fatigue.
The new meta LS50 have detailed measurements in their whitepaper and they appear to be much smoother in the highs with no peaks like the original LS50 so I wouldn't expect them to be fatiguing at all .
The new meta LS50 have detailed measurements in their whitepaper and they appear to be much smoother in the highs with no peaks like the original LS50 so I wouldn't expect them to be fatiguing at all .