An okay filler story, clearly meant to bridging characterization from set to set (setting up for Liliana to have a redemption arc, for example) and be a plane that WotC can return to. I didn't really love the main story, though I didn't really hate it either; it was just...okay.
I didn't really care at all about the side stories, though. These were pretty much all slice-of-lifeish stories about a random (non 'walker) student from each college, and I didn't really care about any of them. They were all worldbuilding that will be important to Strixhaven if we ever return to the plance (which we might not, considering I heard nothing but complaints about the set: everything from 'it's a reskin of Harry Potter' to 'the cards just suck'), but for now is just...not important and that I didn't considering to be particularly interesting.
Feel free to take this judgement with a grain of salt, though, because I'm trying to catch up on lore (I had major issues last year IRL and didn't read much Magic lore because of it) and anything that's not really relevant to the story of New Phyrexia is just sort of there. I might come back and reread this at some point to see if I have a different opinion when not trying to catch up on five sets worth of stories, but for now the judgement is that Strixhaven isn't really a set I liked.