Yeah, in previous editions, we got smaller, more frequent, more tightly focused content. I agree that under the 5E paradigm, it's preferable to no leave no gnome behind.
Given how fast this was turned around, I suspect it was designed for both simultaneously.
Strixhaven might have been designed with D&D in mind but it was designed for MTG primarily.I don't know that we can assume that. I expect the two departments coordinated heavily on this one
There's 5 colleges. One for each "enemy color pair"
It's all full casters in protagonist and antagonist roles. The main enemies are wizard and warlock terrorists.
Noncasters are historic figures, have no modern role, and have little representation.
The dragons are background characters
The dungeons has little spotlight
I'm not saying it can't be used in a campaign or you can't run a Strixhaven campaign. But it's a major departure from standard D&D or even more exotic versions of it. I have to see more before the usefulness is shown to be worth the price.