Personally in my homebrew sword & sorcery world I don't use human racial attribute mods for PCs, for one thing they do weird things to Point Buy; a +2/-2 can be worth another 6 points if you use the +2 to boost an already-good stat.
I kept the racial stat mods for my OGL Conan game, I agree that in principle racial differentiaon fits the setting well, but it does mean that the system strongly favours min-maxing with all Cimmerians being STR 20 barbarians at first level. I kinda think the 1e approach of using race(& sex) based minimum & maximum scores is possibly a better way to do it, eg Cimmerians minimum STR 6 max INT 16; that lets you play a smart Cimmerian without making a deliberately sub-optimal build, the racial mods effectively cap Cimmerian INT at _12_ if you want a system-optimal PC.
Likewise if you wanted you could say that the 3-18 range was the standard for human male characters and cap female characters at eg maximum STR 16 minimum CON 6 minimum WIS 6 minimum CHA 6, or whatever you think reasonable - a problem with this approach is that maximum caps affect PCs far more than minimums do, so they can seem unfairly discriminatory. I know when I (and other players, male & female) make female Fighter-type PCs, I keep their STR at first level to 16, though, even though that might not be totally min-maxy they're still perfectly viable and it keeps them within my/our comfort zone of suspension-of-disbelief. I have enough trouble with the idea of STR-20 human male Cimmerians, STR-20 human female Cimmerians even worse IMO.