Could you elaborate on this please? I'm not sure what these drawbacks could be...?
Haven't looked into it enough to call people out, just sounds like the person suggesting it doesn't do it, AMIR doesn't do it, Genelec doesn't do it, on forums people mention not correcting above the schroeder frequency of a room, etc.
Maybe there's a better way for me to phrase that, as it's an observation, and I'm not saying I've tested it or have an opinion besides right now "don't screw with it if many people who are smarter don't, and it's already relatively flat in my room."
My strongest opinion on the matter is that by default newer speakers should be getting more and more accurate, and it's too bad the specs don't show that, and I don't think someone should have to use GLM to manually tweak things as it can probably automatically work better than a human tweaking stuff.