Storyline waiting...
I know you can click continue now and not have to wait the time to gain extra skills if you want your character to be weaker than they could be. I personally can not gimp myself like that. I don't think there is anything wrong with this system but i fear that the wait alone will bore and discourage many players. It's fun the first time through the story as it's fresh and intriguing but when you have to replay the same storyline when advancing another MP level it gets tedious. Even taking a different path it still feels the same. The free roam mode is great but I am talking about the pure storyline mode. The only thing players can do while waiting is look at their creatures/skills/adventure log/forums/MD shop, most of which won't change until you continue in the storyline.
I know it has been suggested to have side games to play or something to keep you busy while you are waiting for your next "choice". Even if there was a storyline waiting room that would be great, a way for the community to stay in touch and people wouldn't feel so isolated by the wait.
Just my feelings as I wait for the next page to turn...