I disagree, being able to play Destiny as a solo player has not killed the game. What is killing the game is bad decisions from Bungie and bad game design. From the first day of Destiny 1, it has supported both solo players and team players. The only way to keep players in the game, and maybe find a few new ones, is letting players have an easy way into the game. Personally, I would say that the game is getting worse and worse for solo and casual players. Before, we had an interesting story (generally), and the player could flow with the story. There where challenges in the game, but not too difficult so it destroyed the pace, you could sit down an hour and progress in the story and side quests, and then continue another day. Nowadays, some story sequences are fairly easy, but then in the end you meet several bullet sponge bosses in a row, and if you die, for instance, at the last boss, you have to begin from the first boss, all over again. And the missions are way too long and you can't save the progress, so if you have to quit, you have to begin the overly long story mission again, and face several bullet sponges in the end where you know you'll die xx times. Personally, it has led to me not finishing the last acts story/exotic missions at all. I can't sit for so long playing, and I'm not a masochist, so nowadays the game feels pretty much uninteresting since I know I don't have the time to be able to finish anything in the game. The little things you could do is very unrewarding. So, I would say it is not the casual players or solo players destroying the game, If you have the time to sit and play together with friends for hours in a row, you have all the possibilities to do that. You can play every type of activity in several difficulty levels. Solo players and casuals don't have that much choice. Most issues and problems relates to bad game design. Who matches to who, bugs, bad stories, unbalanced activities and missions, too much grinding, too long story missions, not being able to save progress, bullet sponges, meaningless stuff forced into the game such as potions that is just there to take players time, silly mechanic stuff there for the same reason and a lot more. That is all on Bungie - not solo players.