Do you get specific mutations for certain classes, or are the all random? I have several mutations that I am not using or don't have the skill for. Are these stuck there or will they be replaced by random new mutations?
I've been playing for about 40 hours using two characters. I've also had several mutations for skills that I didn't have.
Most of them were replaced randomly after my characters suffered minor mutations or when I used Mutation Points.
If a mutation or skill doesn't have levels, it may be replaced the next time you mutate.
In other words, if there's no "minus" button for you to click next to the icon of a mutation or skill, it may be replaced randomly.