I'm also new to SoD, so I apologize if some of the ideas are already in-game...
One thing I hated about EQLive, was how it punished the casual player by forcing people to guild in large numbers to accomplish big things. I think the LDoN model they incorporated was a good start to help those of us who couldn't frequently raid, still have the opportunity to find items, have fun crawling, and take on "boss" type mobs.
One of the more underutilized quests that my guild LOVED doing were the Scout quests (ring events) on Luclin. Something like that would be fun, especially if you could do it with 3 - 12 folks.
Server pop being what it is, you've got to make content that can be handled with small groups, yet is content that is fun, and satisfying from a "loot" standpoint.
Tradeskilling, with the ability for players to quest to create exceptional items, works well in EQ2, and something that can be done solo.
Overall, I'm enjoying the game so far, even though I'm trying to not get caught up in the EQ part of SoD, lol.