I think many of us did enjoy Diablo 4 but the systems that make an ARPG shine fell through the cracks which is surprising given Blizzard defined the category.
I am very much am aware they aren't the same people running the show now from Blizzard North, and they had some major team shake ups in D4s dev cycle, so that was part of the problem but it's hard not to have high expectations.
It's just those pieces or connections in-between the excellent departmental work that fell apart, along with the foundation of an ARPG being flawed, that a gaming generalist could have solved to bring it all together.
I imagine things would look quite different now if that generalist person or persons on D4 played ARPGs for decades, had Diablo DNA infused in them with equal experience in game design and systems, and had some authority they could have made the best ARPG all over again since D2 given how good D4 is in so many ways. They equally learned a lot from D3 and it's shortcomings but that knowledge all felt lost in D4.