This is something that should have been since the beginning. Matchmaking not being a thing when you select a higher tier, just doesn't make any sense what so ever. Not only does it not make any sense, but it locks people out from these content. Sure you could solo it, but not that many players take on these sorts of challenges. This is not a post made by a solo player who just refuses to join a clan. I am in a clan and i have friends who plays this game, but the issue is that you won't always be able to play with them. They might be at work, sleeping, playing with someone else or just doesn't feel like playing the game / content. As of making this post, both my friends and clanmates are all offline, so if a wanted to do a Legend Onslaught, or any of the tiers above Heroic in Nightfall, i would either have to find a team with the team finder or Discord lfg servers. Worst case, try soloing it or just not do it at all. There is no real reason for these to require a pre-made fireteam. I can understand for raids and even dungeons to an extent, but for a nightfall or a seasonal activity, i just don't see it. Enable matchmaking on the higher tiers, this will help everyone and not just the solo players.