This could be a bad idea, but what if civil militia was replaced with a bonus feat (that can't be an ASI) at lvl 1. Maybe even further limit the selection of feats from this racial bonus if you feel some feats are just too strong. I feel like this could make humans flexible for any build, but wouldn't make humans too strong when compared to other races. It also stays true to how tabletop RPGs always emphasize humanity's versatility.
