The code you use to generate random NPC's needs work. Min and max sliders and mixed without any rhyme or reason.
I end up getting people looking like they ran away from a circus freaksow, or like they have cancer.
I have seen things like this serious hurt games before. People don't want their perfect little colony populated by freaks. It kills the desire to play. And starting from scratch to get a some new faces (which will likely suffer from the same problems) is a big no.
So my suggestion is to simply add a button for recruited NPC's to re-roll their generation, so it will randomize their apperance.
Seriously, fix this.
It's extreemely annoying