Pretty sure they have in some way or another, it looks like a washed out version of it.

blizz killed d3 when they blocked trading ages ago

And when gameplay was reduced to aimlessly grinding randomly generated maps.

Diablo II end game farming is fun because different bosses give different results, and you can do targeted farming with specialized builds based on which type of loot you want.
Diablo III end game is "kill whatever, we don't care, here's your loot"

Because its boring trash....

I just could never get into it no matter how hard I tried.

No trading killed d3

No trading
No PvP

That is what killed D3.

I had much fun with the Auction House though

How does one kill that which has no life?

then should have just expanded d2 again and again

Yessir