I agree - voicing concerns about the team is perfectly reasonable and logical. Immediately going the "ohmigod, we're going to be terrible and we'll be lucky to win 6 games" Chicken Little route is not only tedious and obnoxious, it's incompatible with being a fan. Being an interested observer and a fan are not the same thing.
There lies the crux of the problem. We have way too many people here who seem to catch "Chicken Little" flu. We need medical science to find a vaccine for this crippling disease.