I recently upgraded to alpha because I have more free time now and I want to help find and report the bugs. And believe me, there are bugs. Ships flying through the Dreadnaught without actually hitting it, lag and stuttering when various things happen, etc. It's not at a "playable" stage, where "playable" is defined as "hey, this is fun and I'm not upset because the ship I was just attacking and almost destroyed has suddenly disappeared and shown up right behind me." Because that's where it is right now.
But it looks great and it's coming along. It's a hell of a job to program something this big, and an even bigger job to make sure it works near 100% so things like disappearing ships don't happen anymore.
I ran a Neverwinter Nights server for several years, and I caught more hell when I decided to add an entire Drow & Duergar races and Underground that covered the entire stretch of what I already had above ground. It kept getting pushed back (mainly because of time as it was a part-time thing for me), but also because of production, building, more enemies added, scripting for new areas with unusual things, and lots of testing, retesting, and more retesting. I finally started telling my players, "It'll be done when it's done. Stop asking. Because I want it done and available as much as y'all do."
So I understand what our programming team is up against. Let's let them make sure that they get it right, and with plenty of testing, so the masses will be happy.