5th edition needs to be simple. Ditch the powers, ditch the grid. System mastery? The character-building mini-game? There's no reason at all to put any of that stuff in the core rules of the game. Sell a simple "essence of D&D" as core, and put the complex tactical combat, the piles of powers for character building, and all that other nonsense in hardcover supplements. That way,
1) WotC gets everybody's money for the core game. People who would normally abandon D&D in favor of Savage Worlds or a retro-clone would be inclined, I think, to play a reasonably "basic" flavored 5th edition.
(1) Core Rules. Everything you need to play a Heroic Tier game. Character generation (not creation, generation), the basic four classes, the basic four races, lists of spells and monsters and magic items, the basic Dungeon Mastering procedures.
Obviously, I can't speak for everyone, but you just lost every D&D player and Savage World gamer I, personally, know.
They don't want generation. They want creation which does not have to be complex as demonstrated by Savage Worlds, Cortex, Unisystem andmany other games
And 4 races, 4 classes is, definitely, not going to satisfy them. They will not find that enough choice for a D&D core book.