Two things, one, is there any plans to make choices to add or take away skills to the characters, like taking away someone's knowledge on fighting or adding the knowledge on cooking itself? And two, are you ok with people modding this?
absolutely! there are actually a few skill related tfs in game already!
Modding is welcome! but i would ask that you wait until the game is complete as the code is frequently changing and nothing is in a finalized state yet. i'd hate to make you re-do all your hard work!