The game as it stands now is still clearly under development...but...even if i were not an alpha backer i would still be happy to sub right now...these are my core reasons why.
1. You get to pick your 'home' early on and have a much better choice of locations on Sanctuary (the safe starting world). I have set my pitch up on the edge of a lake and it makes the world feel a lot more personal. After a year or so (maybe a lot sooner) most if not all of the 'best' (whatever you view as best, lakeside, mountain side etc) locations will have gone...
2. It takes a long time to get into the game.. a lot of trial and error on building so you get lots of time to practice and develop your ships.
3. There is already quite a bit to do...mostly in the building area but still, its going to keep you busy.
4. You get to start the clock ticking on training your talents.. they train in real time, even if you are off line so good to get going sooner rather than later.
5. These guys have built something very unique here that could have an amazing future, I am glad im part of it and helping this game get the best launch possible. There arent many games in this genre out there, if we want these types of experiences to last all we can do it help with funding. Im no game developer:)