Your anger is really misplaced.
If you like the attraction, then be happy and enjoy it. Does your enjoyment of it really have anything to do with if other people enjoy it or not? Do you really need to make yourself feel better about Stitch by ragging on other attractions that do have outstanding features?
The truth is, there is nothing outstanding about this attraction. Most of the elements are mediocre at best. The Stitch AA is the best thing about the show - but he is in it for such a short period of time it's not enough to be fufilling as the "focal" point of the presentation.
Philharmagic, for example, is brilliant in my eyes. No matter how many times I see it, it's more magical than the last. The effects are appropriate and exciting, and on top of it all it's served up with some of the most beloved characters in the Disney family with some of the best music Disney has ever produced.
Can you say the same about Stitch? I can't. That's why we can forgive if the plot is a bit weak in Philharmagic, although it certainly has much more of a begining, middle, and end than Stitch does.
You are also missing essential theory if you are going to make arguments like this. Look into Bertolt Brecht's theories of Epic Drama, where a succession of scenes are relatively meaningless when taken alone but when presented together form a greater whole. This is very similar to the eventual decisions Walt and the Imagineers made when designing things like the Haunted Mansion and PotC. They realized that a moving vehicle isn't the best way to tell a linear story, and instead designed set pieces that when put together make a whole, epic experience. Philharmagic is a great example of this as well - it's not the cohesion of scenes it's the overall effect of the experience.
And again, I cannot say SE exhibits any of these characteristics. Stitch feels like taking one scene out of Pirates, or Philharmagic, for example, and selling it as a full attraction. There is no cohesiveness to the experience. I was left feeling "Stitch escaped, so what?". There was no consequence for anyone, we are let go, see you later. That's why most reviews will tell you that it will play well to children (well, those that can get over the darkness), because those children ONLY want to see Stitch. It's clear that's the audience it's intended for.
I think most people are disapointed because this was never going to be an epic attraction, so it NEEDED a story. The effects aren't enough on their own, and neither is the Stitch AA because of it's brief appearance time. These elements could have been woven together with a story that makes people feel like the experience mattered, not just that we happened to witness Stitch escape - which would have been great if this had been part of some sort of epic progression. But it's not.
I hope everyone who experiences Stitch enjoys it; from the reviews I've read, with very, very few exceptions (basicly one or two posters on these boards) people really haven't. /shrug. As I've said before, fans of the ride should rejoyce - it means smaller lines for you. 
AEfx
