Clan rankings, grimoire, future raid ideas and additional game modes
Here are some ideas that might improve the game (it's in dire need of improvements):
1. Clans should matter. Adding a leaderboard and clan ranking systems (with special rewards) for each season would certainly improve the experience
2. Bring back the grimoire and grimoire score
3. Include a new race or make us fight other guardians who have gone rogue. Maybe the new raid could include guardians who we thought were dead or something. Maybe even eris morn can turn on the vanguard and we have to fight her and her fireteam
4. Include a raid challenge mode were you have a timer and you fight other fireteams to see who can do it faster
5. Have tournaments every month. Could be crucible or a timed pve event or even srl
Hope this helps!