I find it quite difficult to know what is the "right" amount.
If you do too little praising, you are accused of becoming jaded (this happens to me all the time).
If you do too little criticizing, you get accused by the longtimers (who really notice the decline) of pandering just for the sake of balance.
There's also the problem of perceived "fairness." I could arbitrarily give 50% attention to praise and 50% attention to criticism, but that doesn't really send a clear signal. Are things bad or aren't they? A hypothetical column like that written in 1966 or 1971 could point out a 50/50 ratio, too, but the objective-me would howl that there's no comparing 1966 with 2011. It's a forced, artificial balancing of good and bad.
I also worry about "reverse-jaded" attitudes. Just as we might imagine a "jaded" visitor, I could easily posit a corporate person at Disney who reads online criticism and gets "reverse jaded" if the criticism ALWAYS contains 50% good and 50% bad. It would make the 'bad' seem less of a problem. "Oh, this guy always has 50% bad; it's what he does."
So the true, most objective way to characterize the park is to call it as you see it. I strive to point out the good when it happens. But I'm open to the idea I ought to do it more. I just don't think that I ought to do it "just because."
I have personally enjoyed your articles, mostly because:
1. You care.
2. When you have a critique something, you back it up with facts.
3. You're don't sensationalize things, whether they're good or bad.
As always, keep pointing out when things are good and when things are bad. Don't feel obligated to pander to either side. No where in Merriam-Webster's definition of fair does it say 50/50. I think this part of the definition applies:
"6a: marked by impartiality and honesty : free from self-interest, prejudice, or favoritism <a very fair person to do business with> "