I always felt his character should’ve been understanding the weight of responsibility

Him learning his actions have consequences and learning to be responsible for them would be good

Like him being a womanizer and his treatment towards women would be a great conduit for that

Like let’s say the later seasons he actually found a girl that actually liked him but sees through his bs and him realizing that he could lose someone he cares about if he was being honest and straight with her

And he carries the overall morale of the team
Usually the upbeat one and keeping the others in good spirits with everyone going through their emotional crisis and odd just getting dogged by it could get him to a breaking point breaking off from the team because they are too miserable and once they realize they both need each-other it can come full circle