I tend to rearrange content in the walkthrough to help fit in the events of the latest update. For example, the next update will include an expansion of Evelyn's sleep molestation scene for ability increases. I may have to move back the events that lead to her leaving in order to experience that expanded scene. At the end of the introduction to the walkthrough, there is a section in bold that says something along the lines of "it is recommended the player, if following an earlier version of this walkthrough, load a save prior to day X or start a new game." I may do this even if the cause isn't obvious, for example, Belle introducing new hidden variables that affect the progression of certain events. Restarting from the beginning is always a viable option. I actually do a fresh playthrough each version of the game to ensure the walkthrough works for those who may be playing for the first time.
You don't have to pursue the relationship with Primrose if you don't wish. You should always feel free to play the game in a way that is most enjoyable for yourself. That is the reason I include the variables in the walkthrough, along with the requirements for various actions, so players can hopefully account for any deviations they wish to make. Since there are no complete questlines in the game yet and no endings, the goal of the walkthrough is to experience as much content in the shortest amount of time possible. As more content is added, the walkthrough will change. Since there is no way to advance Evelyn's relationship yet, the walkthrough follows the path where she leaves, since that route currently has more content. Once new content on Evelyn's relationship route is added, the walkthrough will change to follow that route. The reason the walkthrough follows the Primrose romance route is because that route is complete and in the game. In the future, once endings are added, the walkthrough will probably take advantage of the New Game+ feature and be broken into multiple playthroughs, each following a different path and leading to a different ending. That's the general idea, anyway. I don't know any details of what Belle has planned, so I can't be certain. Those are my tentative plans, though. Until that point, though, the goal of the walkthrough will be to experience as much with everyone as possible, even if the end result ends up being brutally murdered by a mob of jealous lovers.