Why is the Canterlot Spire built out of a small number of large blocks? They went out of their way to do it, but it makes no sense. It's not more structurally sound. It didn't make construction work more efficient, in fact I have seen reports from the time claiming it did the opposite. It's not a requirement for shape or aesthetic, there were other ways to achieve the same uniform look. Officially it's more or less an exercise in style, but that doesn't track. It doesn't line up with any architectural current of the time period, and the architect is a nobody. From what I could find it looks like he was just a stallion they called to supervise the works and so they could put his name on paperwork, but I doubt the project was even his considering everything else he worked on afterwards and before.
The official reason for its construction doesn't sit right with me either. It's meant to be a symbol of unity, and I guess that fits the theme of the park, but there's nothing about it that sets it apart from the Reconciliation Fountain, and if I have to add my opinion it's not any better looking or more impressive than that. It's not even taller than some of the other towers in Canterlot, and the plain white surface doesn't make it stand out. The only thing that's relevant about it is that it's the only actual building in Reconciliation Park. I'd brush it off as a tourist trap but it's run by the Crown, and money isn't something the government has ever had problems with.
I've got some time to kill. Classes at the Academy won't start back up for a few months and I'm already done with all my assignments. I'm entertaining the idea of doing some research on my own and maybe turning it into a report. We'll see if I can find enough material.