Terrible matching experience, my friends are online and I cannot play with them because we are not in the same tier, if I want to play in a tier above mine, that should be my choice. If the players in my friends rank are better than me, it should be my choice to play or not. If you also want to stop hackers from playing higher tiers, you can effect the tier matching by how long the user has been on the game, maybe less than 1 year or 6 months should not be able to play with those above them.