I would really like to see a daily quest/mission/objective type mechanic in the game. Something that can be completed in 15-30 minutes. These kinds of things allow me to play and feel like I am accomplishing something when I don't have that much time to play. During a busy work week for example. If I can log in and complete a daily quest, I feel like I have done something and it keeps me engaged with the game even though I am not able to do the large events. It needs to be at least partially random and solo friendly. This will help keep players interested in the long run.