Hmmm I agree that it would be nice to have some 24 person or even 16 person content. But I'd like to see this starting at lvl20 and maybe a new dungeon/event every 10 levels that way. Yes this can be open world event - maybe something like a specifc NM is rampaging through area you have to stop it. And it would be moving all the time until it's defeated. Maybe at rank 9 FCs they could get something like that as FC-quests.

I'd also like to see some 8 man dungeons starting at lvl 20 and onwards to get people used to it beyond guildhests(again 1 every 10 levels would be fine).

As for FCs basically catering to a specific 8 person group... started in such, went to another one that seemed to be better but in the end devolved into that. Now helped start a new one that is focus on getting everything some fun and not just focus on endgame. And we do... we ran a 4 DD copperbell mines nm a week or so ago... 3 of us with low level chars - one even new. We had a blast.