Jester David
Hero
There's no need to be rude.Again, no! It is build like a player's handbook. It refers chapters that are missing (like the entire section about Backgrounds and thus it is not complete to actually build characters with it). And it is clear that it was written after the latest public playtests (and normally alpha tests happen before open testings). So, stop being a smartass, I know what I am talking about!
You are correct on the naming of "alpha" in video game being pre-beta, but that's what they called the friends and family testers, even during and after the public test. That's how several private playtesters have referred to themselves.
WotC continued private playtesting for many months after the public tests ended. In fact, it's likely still ongoing, testing monsters and the DMG rules including some rules modules.
I've seen screenshots of the document. No art. It looks just like the playtest, only the rules are *closer* to finished.
I imagine near the end of the private playtest they stopped making separate playtest documents and just started cut-and-pasting text from the PHB document. Hence the references to chapters and the like.