This is a simple idea. When you do /duels it should not be on an uneven hilly terrain. /duels should take you to a 75 by 75 platform in the sky that you obviously can't see when you're not in /duels. This 75 by 75 platform can have like 10 different designed it would be fully flat and have invisible walls on all the sides so you can't fall off the map.
He means that he thinks there's a 50 percent chance to spawn on the better side, so half the time you get the better side, half the time you dont. Neutral for this, duels should be flat but idk if them being like out of the map is good.