You're really just finding excuses to think it'll succeed though. I want it to succeed myself, and I definitely think it has a very reasonable chance of succeeding.
But your points aren't unique to the game. Remember all the disappointing AAA games? What about Watch Dogs? Just because the game has as much funds as an AAA game, definitely doesn't mean it will fulfill its promises. (And before you go "B-BUT EVIL AAA GAME STUDIOS", remember that as it happens, AAA studios want their games to succeed too.) And it being the most crowd-funded game in history has literally no relevance. All that means is that people believe it, and people believing something isn't a good indicator for something's reliability.
And plenty, plenty of games are somebody's vision. And plenty of those games have failed.
Not throwing all your support behind a game is not "extreme negativity". It's "not blindly believing a game will succeed no matter what just because I really really want it to succeed."
The spectrum doesn't have to be neutral either. Skepticism is healthy. While I'd probably buy the game when it releases, I can assure you the game will not live up to expectations. It'd almost certainly be a fun game, sure, but it won't meet expectations. Remember Starbound? The game that everyone was super-hyped for? And now a ton of people hate/dislike it? I was also skeptic for Starbound. And now I'm one of the people enjoying it the most.
PSEUDO-EDIT:
Jocan posted before I posted this. His post more or less has the same point as my second paragraph.