Nothing against Hogwarts, but the way you want to set it up would put me off the pack. Having my sim sorted into a house by traits would only lead to stereotyping. Havin them sorted at all by the game instead of my me would lead to frustration, because the game cannot know my sims' full values and characteristics.
Being restricted to a world with a definite goal would not mesh well with rotational play. Goals in general aren't meshing well with The Sims, and Sims 4's aspirations were a huge mistake that only stifles creativity. Most prominently they gave Strangerville, in itself a decent pack, the reputation of "can play through in two hours, then nothing to do anymore", because players saw that stupid aspiration and did as told.
JtB could have been so much more, as a Star Wars collab it is a big wasted opportunity that would have worked better as a spin off. That's not even a question.
But the pack blends in surprisingly well with normal sims gameplay. Batuu has several village sized settlements that the player can create using existing Sims worlds (I use Sulani). Occasionally your Star Wars themed sims that work as maybe gardeners, military, criminals or astronauts will visit the capital, Black Spire, and involve themselves with the politics aka quests there.
