95% of the content can be done alone. 5% are the raids. Its more an "online-game" than a MMO ?
To make a move, give us :
Supergroup's clan base/headquarters that can be prestige with very long farm.
Daily/weekly related to the factions : very specific missions for X-men,4F, Avengers, defenders. Can only be done in party with mates from the same factions.
- Daily/weekly related to the supergroup. Reward about in/out base's cosmetics.
- Daily/weekly related to the party only. Split the personnal daily from collective daily.
- Personnal area with special quest to customize it.
- Legendary quest related to the party.
- Real weekly and even monthly and yearly. Weekly : kill 10 000 mobs, 50 LQ, 15 dailys done etc. Something hardcore. The only hardcore part of the game is some achievements.
- Then i'll play much more. I only play to level up caracters and do raids, daily and weekly (in 1hour!).
Check what Cryptic is doing on Star Trek Online about collective play/farming and superclan's management.
Give love to the MMO's aspect, please.