From what I remember, neat premise but it just doesn't have a focus. You could say that Minecraft doesn't have a focus but it does, and thats building. This just has to many major mechanics, so I don't know if you would buy this, thats up to you. But it just looks and plays blandish
Also, there was a game that already combined Minecraft and FPS and does a better job then this alpha does, go search up Brick Force and you'll find out a neat little game doing this combo well.
P.S. Creating "The New Minecraft" just isn't going to happen for some time because Minecraft is still very young since release. If you guys learned anything about Blizzard within the last year of gaming, the "WoW killer" will only appear if it takes away the audience for WoW, same goes with making a new Indie sensation like Minecraft.