Does it have a level or xp cap before it becomes locked out? I was in a match weeks ago against a dude that was way higher level than the rest of us and just owning the whole team. He was way too good to still be trolling in Casual Mode picking off us noobs.
What level are you now may I ask? I remember my casual mode locked after my first time playing it, however i was at least level 10 or so I believe.