How is BXR an unfair advantage again? This is something that I have never understood. Exploiting BXR is just as much cheating as some of the skill jumps that people use to get around the map. Sure, the designers probably never meant for people to jump from the bottom of Lockout to the top of the sniper tower in a single jump, but that is far from exploiting.

You could make the same argument for that. You could say that making these skill jumps gives players an unfair advantage because:

1: It was an unintentional design flaw
2. Disrupts the designed flow of the map
3: Gives unfair advantage to people who practice it

How is this different from BXR? It's actually much easier to do than a skill jump. BXR is something that literally everyone can do. It's not an unfair advantage if everyone can do it.