This isn't an essay or an article. This is a game. The game designers aren't trying to wow people with the playtest, they are trying to test mechanical components. They want to know people's thoughts on what is in front of them, not what they think of 5e as a complete product, since at the moment, 5e would fail utterly as a complete product. If this playtest was the final product, was actually released as the 5e PHB/DMG/MMs, then I'd agree with you. For now, I think that some of the criticism of the 5e playtest is unfair, since people keep wanting to judge it as if it were going to be showing up at your local game store in a month.