Is everyone comfortable with WOTC dictating this degree of your setting?
Wizards literally --
literally -- cannot do this. This is an impossibility. They do not pay me; they do not have me in chains in a Renton basement; they do not have a drone targeting solution on my wife and cats. When one of those things is true, I will complain. In the interim, my setting is completely unaffected by the thickness of Wizards' D&D5 lore, whether it is clotted cream or filtered water.
What I do object to is the inclusion of /mechanics/ in the core books that do not belong, like a drow subrace of elves or the entirety of the warlock class. Thanks, Wizards, I'll never hear the end of these in my game store campaigns. Way to sell me out.
But while I truly and deeply despise the appearance of the horrific mutant D&D5 halfling, and will never forgive the atrocity (however fictional) that has been perpetrated against that noble race, I carry my torch because I don't want to be staring at those enormous noggins and creepy tiny hands and feet for years every time I open a D&D book, not because that's what halflings will look like in my campaign. Wizards doesn't get to decide that.
Hussar, there's a pretty good case for being disappointed by some of the lore choices in the new core books; don't muddy the water by claiming that the lore choices somehow hurt you and your campaign directly. If nothing else, they're helping you by identifying what you /don't/ want elements of your campaign to resemble, which is in itself encouraging creative thought.
Like the man says, you can please some of the people all of the time, or all of the people some of the time, but you can't pick your friends' noses.