The hundreds of hours you will have invested in those alternate characters to get through the story nullifies your argument about time. The hour-and-a-half you would spend potentially on each character for this section is a fraction of what you will spend doing the story as a whole, each time. You will spend more than 7 hours just doing the hundred Quests between A Realm Reborn and heavensward for one character. If you want to talk about a time waster that would give you more credibility.