If a full pirate creation mode can't be done, how about some filters and small tweeks.
I like to play as a female character, it would be great to have some filters so that my random pirates were all viable options for me.
Filter ideas could include:
Gender
Age
Personality
Or how about an option to tweek our pirate before exiting, could also be a cool idea.
Once we select the random pirate, maybe we could be given the option to change their personality so see what facial features we like best on them, or change their age, skin, eyes etc.
It would certainly make more of the current creations we roll more of an option to us.
