Yes! We altaholics definitely need more character slots! Either that, or we need to be able to change our character's races after the Legacy patch launches. The reason for this is that if Legacy was included in the game launch, altaholics like myself would have been able to take advantage of the benefits like unlocking new races. Because Legacy was not included in the launch, people with multiple characters must create more characters in order to take advantage of the newly unlocked races. Changing races after the fact would fix all this because it would allow us to have access to the races we unlocked after the fact, although people who like leveling alts don't normally shy away from rolling another character.
In addition, one of the best aspects of this game is the ability to play through the same class and have a completely different story if you change the decisions you make. It only makes sense that being able to explore all those different options and explore the amazing storylines would require at most 16 slots. I think anywhere from 10-12 would be acceptable for me.
Nonetheless, I want more character slots when Legacy launches.