Unfortunately just another petty bandwagon for people to jump onto.
Content not making it into the game does not necessarily equal disappearing into the nether completely as too many assume.
Why do people assume that parts of it do not come out elsewhere in the game.
Blizzcon is early plans, and anyone who makes those arguments is just in denial of how things can and will change over time during development for a variety of reasons.
Not everything works out, and as shown by player feedback things can change dramatically if the feedback is good.