i made a post about this a couple of weeks ago a lot agreed. once you get to a third character the campaign is a major chore. there is no logical reason to have us do it all 3 times. it should be optional and should not block you from activities if you did it on one character.
The key statement here is once you’ve done the campaign on one character it should unlock all activities for all 3 characters. Then the remaining two characters can do the campaign at their leisure and not be restricted because they haven’t done the campaign yet.
I did one Guardian then took my sweet time with the last 2, took me 41 days and I was happy with that.