You're telling me it took them the better part of a year to nail down the fact that the game would have six stats, AC, and hit points?
No, I'm saying that bit I suggested is likely the "core" that is being described as completed, whilst most of the rest is up for grabs and more likely to change due to feedback in play testing.
I have no real interest in either defending or attacking the designers.
At the moment I'm thinking I probably won't be playing 5E (4E still wins - please release the "quick combats" module!), but I see no major flaws with WotC presenting a very early stage of design, and going through multiple changes due to player feedback.
I recall some early rumour-mongering blog posts before the initial public playtest docs, which were already admonishing WotC for having the game in a "final version", that they would be ignoring player feedback - it was just a media circus and that the whole thing was a giant marketing exercise to push substandard product. This is obviously not the case, as playtest docs 1, 2 and 3 have been making big changes, and the design team has been responding to feedback by making changes to the game rules.
It seems to me, no matter what the design team do in public view, there will be blog posts, forum threads etc telling that they are "doing it all wrong". Of course a lot of the time posts that tell them to go faster will be by different people than posts that tell them to take things cautiously, but the general weight of the critiques seems to be negative for no good reason (other than perhaps we all like to have something to be grumpy about)
The playtest process is a big experiment for them and us, there is no precedent on how to proceed, and no real-world experience that internet theorists can base their advice on, other than ropey analogies to software development.