Beside the body type customization where we could play with some body height and size parameters:
Character customization could be done ingame while playing by allocating attachment points to each part of the body structure:
-Head
.mouth
.eyes
.ears
.nose
.chin
-Neck
-Shoulders left/right
-Upper arms left/right
-Lower arms left/right
-Hand
-Torso
-Belly
-Back
-Waist
-Upper leg left/right
-Lower leg left/right
-Feets left/right
Through the ingame building mod could build each of those parts seperatly and attach them and while in a standard standing pose, beeing able to adjust the position and rotation on the body, script them, adding aura particules, blinking light, lazers etc...
Limiteless possibilities, everyone will have his own unic self made character or share same unic designed armor or suit as his community members...
Later on could also trade those creations