Apart of being absolutely supporting Ernyoka1's request (tired of female genitals looking like public bathroom graffiti and of zeppelin-breasts), a next step very much underrated and underlooked would be independently poseable toes (at least separating big toe from the other 4) and -even more important- more realistic hands, that include the possibility to bend the carpus along its length (imagine a line running from between middle finger and ring finger to the center of the wrist). I'd keep high the poly count in the transition zones, to avoid odd looking shapes and spikes when scaling one group leaving the others unaltered, so - as a last suggestion - a full-independently scaleable model would be great... Looking forward to seeing your model :)