Reckoning just requires people to stay in a circle and shoot the boss. I wouldnt consider that as "hardcore mechanics" And even a simple mechanic like that is hard to grasp for the average blueberry. Most of the times people matchmake into Tier 3 Reckoning fail because players dont understand how DPS works, focus firing the stompers or staying in the circle. Matchmaking is a good intention for endgame content, but it will fail due to lack of communication and effort from the player.