Any chance we can have some clues on what spell schools are getting some love in Xanathar’s guide?

Are Xanatar new classes tweaked versions of Unearthed Arcana or wholly new to 5e?

Does the rule that says to choose a grid intersection apply even when a creature is the point of origin?

Why is you decided to include Sword Coast Adventurer’s Guide’s subclasses in Xanathar’s Guide Everything?