At least personally, I have no problems with having to start the game over from scratch. I usually do that with new updates anyway (although, I often decide to make exceptions to that rule when a game has this much content already) and considering the intricacies of the story I think it will be good for me to start from the beginning anyway as it will make it easier to avoid some of the confusion that the first time can easily come with. Remembering all those names and details in the lore can be tricky after all.