It seems to be a trait of Audezes in general, although the XC I heard was a little different. Maybe I've heard a bad LCD2 and a bad LCDX, but have heard a good XC. Either way for the LCD2 and LCDX, there's an innate layer of smoothness over the entire soundscape, which can make things seem less 'tactile' then the offerings from Hifiman.
The XC I heard had great imaging, but the LCD2-- while having a soundstage that could get pretty deep at times-- has a sense of smushiness to it at times, making layering and imaging less distinguished than it could be. You could call it grouped together, but it depends a lot on the recording.