I personally would like to see a lot of group based quests where u need 4-8 players and it would be more "instance" based. So you still can grind in dungeons but have a nice SE story spin on it. Like tale out bandits at their base and there could be CS and enemies talking in battles. I played ffxi for years and the grind could only stay interesting for so long and that's with a game where the classes are done right and the battle system has strategy too. I don't want the wow dungeon fights where everyone just dog piles on the mobs and it's a breeze but would like to see some story structure while leveling and toss in a boss at the end. Each fight could be a few minutes long for strategy and stuff.

And solo quest rewards could be like the justice badge quest on ffxi... Decent non craftable reward that u could use 10ish levels or so... Just my 2 cents feel free to destroy me now lol