In all seriousness, we can understand Swinton’s issues with boarding schools, but as far as the Wizarding World is concerned, she needn’t worry about Hogwarts being a main setting again.
For a brief moment, I considered whether Tilda Swinton would prefer students instead conducting their magical studies at Kamar-Taj, where her Doctor Strange character, The Ancient One, instructed people in the ways of the mystic arts.
The current Fantastic Beasts series is following Newt Scamander (an adult), and while there’s always a chance he could revisit the school he was kicked out of, as it stands now, his adventures are taking place in other locations around the globe.
But the same problem is present: the children would need to remain at Kamar-Taj for most of the year to be properly educated, meaning they would be separated from their parents.