Fyreflie is at least right with the first part of the comment: that atlas uses a lot of personal resources which seem to be missing somewhere else. There are too many construction areas which are regularly postponed and team quests is only one.
I hope that they will get it done soon and that doing team quests will increase the amount of sigils that a person can receive at all. So that the personal sigils are not cut. Because even if you maxed all events and got a lot of sigils in the chests you still lacked around 1/3 Sigils for getting the mystic dragon.
So doing more and having less is no option.