as a player who play for the top when arena, i not agree with this cause it will make more unfair moves. The high rank have more chance to be focused, even if he's not the leader of the game, just because beating a leader is a better win (even if you're 4th). It will make some passive alliance. Fex times ago, ranks were visible when you need to validate the start, and it makes players leave before playing. Or other exemple, and no shame about this, i left against bronze rank cause they're making the game more random and increase the risk of a lose (they play bad, but they lead you to the 4th place too).
It could be interesting if you're sure to fight against players around your rank but this is not how bga works