Better to have your work analyzed and proven the best outcome... than have it praised blindly. Because without critique (even from yourself or within) the work will eventually suffer and you will be surpassed.
The problem on these threads is some people can't understand why someone would be interested in the creative side of things rather than just the consumption of it. So if you are doing anything except consuming it as it was intended... their defenses kick in
Oh, obviously, yes. There are always things you could do better, and it's possible to miss the mark. Never stop growing, never stop asking questions, never stop thinking. But . . . at some point a project needs to be done--and on budget--and practical. It needs to exist. As the saying goes, perfect is the enemy of done. Another favorite of mine is that a creative project is never finished, merely abandoned. That is so true. At some point you need to fish or cut bait.
Of course people are free to opine, comment, armchair imagineer. It's the nature of the beast--internet forums and armchair quarterbacking--that many comments are going to be based upon not enough knowledge--of the project, or of the specific disciplines involved, and more prevalently, exhibiting a personal bias "a consensus of one" as to the quality or value of the thing being discussed. Most frustrating when I have been involved in large publicly visible projects are the people who somehow think they know how these things go down when they obviously don't. There are a few great insiders here, but also lots of "well, if they cared about X they would have done Y" . . . properly translated that ends up "I like X and now that I see Y I wish it was different. Not sure how, or if that's practical or affordable or doable, but I think I'll run down the people who made it anyway after thinking about it for 5 minutes."
It is also so simple to second guess or comment on what is there, as opposed to creating something out of whole cloth. I often ask for feedback and ideas, and the more blank the page is, the more silent the critics. People don't know what to say with a blank page. Once you start to fill it in, they're all about nudge this, change that, but "where were you when the page was blank?"
The reverse of that coin is the sense of wonder when people see something that tickles their fancy, and they can't believe it exists. "How did you do that?" "where do these ideas come from?" "that's crazy cool!". It is because, again, they weren't there for the hours and hours of work it took to make the thing, that it almost seems miraculous. Of course that's wonderful to hear. That's what you're going for.
Hopefully in this case there are more people who fall in love with this work than not.
Disney is not perfect, of course, and we all hold them to a very high standard. Things like the Stitch show in Tomorrowland somehow seem to happen despite that. (ugh!) I often think about how much work needs to go into something like that, how many incremental decisions, and think "how did that happen?", lol.
Another example might be Hogwart's in IOA. Did they run out of money on the building? It's so awesome all over the place, then you get to the part in the queue where the building is completely exposed. Oh, and you can hear the Jurassic Park theme. Again, did they run out of money, or time? It's hard to believe they didn't care about it, given the level of detail in the whole thing. Odd. Wish I could ask someone about that.
Think about any given novel, or movie, or music release. How do bad movies happen? So many people involved. Wow.
Mistakes happen, bad decisions, organizational problems, so many things can go wrong . . .
And so I suppose there will be things about Avatar that also have us asking questions. "Why is it like this?" I prefer those to instant
"well you know what you SHOULD have done is . . . " (because a lot of those sentences end in "built Beastly Kingdommmeeee", lol)
It's more about constructive, thoughtful criticism. To think about all the factors at play in designing and building a thing like this
is staggering. From the first sketches, to figuring out how many replacement light bulbs you need to have in stock and where to put them, and how often to ship new rolls of toilet paper backstage. Staggering. And not all fun.
And finally . . . . the place isn't open yet. We are reviewing some promotional materials, some guesswork, and some spy info.
So we shall see how the final product impacts us when we get a chance to experience it. I am looking forward to that with an open mind.
In some ways, I envy those who have no idea this is coming, book their trip to Walt Disney World, and just stumble upon
it, or don't think about it. They haven't been watching and wondering and prognosticating obsessively (I'm looking in the
mirror, here) for seven years. They are going to be the purest indication of whether this works. They will judge it on
what it is, not on a third attraction that was value engineered out of the plan three years ago.
And so we shall see . . . I guess I just typed a lot, huh?
My products and industry has online communities and its funny to watch those folks go on and on about why 'they' did something... argue with you about it.. when you have the first hand experience 
