That's why I went with a longer stat list in my home brew system. Made more sense to keep stats from doing unrelated jobs. The simplicity of the six stat system is nice, but it breaks the ability to have stats reflect something like a powerful magic user that's also horribly ugly/unpleasant.
Mind you, it also made things get a bit extra when trying to still keep stats to a reasonable list in terms of display on a sheet of paper. Depending on who you ask, that may not have been successful lol.