This isn’t a troll or a slight at Gearbox, promise.
Anyways, in the Overwatch beta if you are killed by an ultimate skill, a little modal popup comes up and tells you what killed you, and how you can counter it in the future. It made picking up and understanding the game pretty easy. It would probably be a good idea to have something like this for PvP. It can be extremely difficult to tell why you died or what abilities you need to watch out for from which characters.
Like getting shield stunned and then bashed to death or Boldurdash and then slow axed in the face. If you haven’t played every character you’ll have no idea what to dodge or look out for when fighting someone unfamiliar. This would be a nice workaround to that, I think.