The game will have a single player client hopefully in March, when land selection phase takes place. We will definatelly have alpha at summer and Beta at fall. The company is way ahead in production from what they actually show in gameplay videos.
If you go hit the forums you will see that they have huge amount of information and the gameplay mechanics are already set by now. The game will be huge and will be something unique untill now. But your general impressions here are kinda wrong.
I have been closely following the gamefor months now, and i m telling you this is in the final straight line. The Devs have even given playable demos to high donator ranks around a year before that, where they could roam the cities they had pledged.
We'll see when they let players test the build in multiplayer or show a gameplay video with more than a few player characters. If they fulfill some of their promises in a reasonable time frame I guess it's going to be reassuring. I remember them struggling for months just to get a new version of the website up and running, so we'll see if they do better with the MUD, MMO and the other things they promised.