My almost complete lack of neighbors, and quantity of neighbors whose main hall is in a constant state of being upgraded, means that I don't have that many neighbors to interact with, even though I have unlocked 100 provinces around my city (unsure how many neighbors that means). My problems don't come from having empty tiles near me, my problems come from having filled but useless for interacting with tiles next to me.
And this still does nothing to make the Magic Academy useful to me. I have two alternate cities, a human one and an elven one, where I built Magic Academies. I now have no room to upgrade my workshops and residences, and am not going to have room for a while because of how the research tree is laid out. If they'd even include just one more city expansion with the Magic Academy I'd be tempted to build it in my main city, but as is, the cities I built it in to test it are struggling.