Player Skill Customization

My wife and I play together but we have different sytle of play. I’m aggresive and challenge creatures head on while she sneaks in, grabs what’s needed, and darts out (probably smarter…). Much in the way we can choose certain bio skills, it’d be cool to see a skill tree of sorts that you can access based on what skills you equip or permenantly learn, like mastering a craft to make extra items, a speedster swimming circles around a leviathan, or make yourself tanky to distract a horde type creature while others escape. This would make co-op have team options or add to single-player replayability.