Was Wynn Duffy even the same character after S1?

Some say he completely changed, going from menacing and creepy in S1 to a guy who spent most of the later seasons raising eyebrows and getting blood splattered on him. Others argue that Wynn was always a chameleon, shifting his entire personality based on what it took to survive, like being Quarles' lapdog.

Did getting shot mellow him? We saw Boyd shift somewhat after he got shot.

Was he a brilliantly adaptive survivor or just comic relief? Did the writers keep him consistent, or was it a total rewrite?