The fazors are solid (aluminum?) blocks of weight though, so it is a direct sacrifice of comfort for an unknown amount of SQ improvement. I say unknown because the only experience people have had with the fazors is on X and XC, which have always had the fazors; so the difference with/without it objectively is still unknown to the public.
Audeze themselves confirmed putting Fazor on LCD-3. People getting their drivers updated all have found a difference in sound and it's been reported for awhile. Only today I am hearing the actual confirmation from Audeze to support that.