RandV
It's a wolf v2.0
If Blizzard eventually produces what the market wants, it'll be because the market made itself heard. Patience hasn't done much for Diablo fans since the last Diablo II expansion in 2001. They're still waiting for a real replacement for Diablo II... 17 years later. I see how it might look like they're acting entitled, but they're not acting any more entitled than sports fans who are tired of waiting to have a winning team. Like them, they're voicing themselves in the hope that they'll be heard. That's just part of supply and demand.
Now I've never been into Diablo but has that market really been waiting 17 years? While Blizzard has filled it at a glacial pace they created an entire new genre with Diablo with tons of imitators over the year - many of them apparently being quite good, like Torchlight or Path of Exile. And when Blizzard did follow up with their own sequel it seemed quite unpopular.
I'm not going suggest I know what people are thinking but it feels to me if someone hasn't found something to fill their Diablo II needs then they're probably looking at it with an immense amount of nostalgia and with that nothing will ever be able to live up to it.