So overall I'm unconvinced that the block structure gave us better stories, though acknowledge that I'm not really the target audience.
It's not that it gave us better
stories, really, it's that... while Magic sets are bad at telling a traditional linear story, they're great at vignettes and setting. Blocks were a way of stringing those static pictures together into a sequence, kinda like a big comic.
I've got a definite hunch that Ikoria, New Capenna, and Strixhaven would've been stronger story-wise if they had been two set blocks. You wouldn't even need to change the stories all that much - just spread 'em out and let them breathe.
(I suspect that Murder at Karlov Manor and Outlaws of Thunder Junction feel off for a different reason — we've kinda been trained by Commander sets that "set where a bunch of returning characters get new cards" aren't "canon".
It feels kinda... yeah.)