starting this preseason i really think that enemies should be able to see your border in load screen
im guessing enemies cant see it because of when there was no ranked disparity in ranked mode so people would lose all hope when they see alot of platinums and diamonds on the other team, but i think now that you can only duo with someone a league below or above you, you should be able to see the enemy border. it makes the border feel more special because all the players in the game can see your achievement, not just your teammates.