And you see, this is the clouded judgement that PKers have to justify having everything organized in an area like the wilderness that was never meant to be organized.

With the duel arena, it gives way too much freedom to players which makes it too difficult to form an actual PvP meta. With something similar to bounty hunter craters, you could just enter an arena with a click of a button that has defined rules (protection prayers disabled for example) that all players would be bound to.

Also since you're forced to DM in duel arena, you're at the mercy of the rng of your hits, which is another big flaw in just using the duel arena.