Obviously there is a lot of room for improvement, especially in conquest. I very rarely ever play conquest because all of my friends play Arena and Assault (and there are no leagues for that obviously). I'm very skilled in the game modes I play, so I want to give myself a "Middle +" because I'm not perfectly sure how skilled I am in conquest.
I can play any roles but I feel most comfortable playing as Support or Warrior because with more health there is less room for mistake