Get the game and enjoy it. Ignore the nay sayers. Try desperately not to get discouraged by the DRM. Since you've played SH3 the bugs and eventual awesome supermod should be ok for you. Sure some bugs are pretty much game breakers, but they'll be fixed soon or worked around.
Just realize it's not a finished game, but it's pretty damn fun and amazingly immersive so far and will only get better.