I myself got disappointed with a lots of dev studios previously changing their decisions many times after KS and before actual release.
More often then not, companies say one thing during KS, and then at release you see something completely different.
So now, even if I like what I see about the game very much, I just to not join crowdfunding campaigns out of principle, till the games is released and I see what I will get.
Even if I would save a few $/eur by buying early I don't do this anymore. When the game is actually released, If I like what I see (and company remained truthful to what they said during development) I will have no problem paying few $/more, rather then spending less money early but get disappointed later.
So not joining KS does not mean I do not like what I see. Quite the contrary, I like very much, but I hope it stays that way too, and then I will buy the game.