overwatcher here. i haven't seen that (though i don't go digging in lucio's tag on tumblr or anything). the main problem i see re: lucio is his almost invisibility in porn. sadly, this is a thing that happens to black characters on the regular in fandom.

OTOH, reaper gets tons of porn. he's a dark-skinned latino. though not everyone draws him looking like that, because dying-cells whatever.