I don’t mind doing portals, pinnacles, dungeons, or even vanguards, but is it possible to make Grandmaster content group-queueable? That way, anyone trying to do the same activity could find two extra players for that high-risk, high-reward experience.
Also, maybe add a new tab called “Raids” with three different difficulty settings: Regular, Master, and Grandmaster. Regular would be the easiest, and Grandmaster the hardest. Players could queue up to join a random group seeking the same goals.
For rewards, Regular could offer older gear and weapon sets, Master could provide tiered versions, and Grandmaster could reward max-tier gear.
I think this would be beneficial for all players, both new and veteran, giving them a chance to complete raids they never got to try or fully finish. Perhaps it could even work where you defeat a certain number of bosses per raid, with a choice of three different raids to choose from each week.