The fact that TSL is beginning to feel like a quickie land to give guests something to do outside of SWL has a lot to do w/ why I've been nitpicking so much, although I obviously can't speak for everyone else here. "But this is for kids!" is the constant excuse, but then...as people have mentioned, so is Radiator Springs, so is New Fantasyland (a controversial pick, but still more beautifully themed than TSL), and all of these include detailed, immersive theming and at least one "original" top-tier Disney attraction. Obviously there are exceptions (with attractions like Disney Jr. and play areas) but part of the charm of Disney is that even rides aimed at children have a sense of timelessness to them, and can appeal to anyone.
I agree that Toy Story is a very hard movie to work in terms of, y'know, bringing it to life...and I sympathize w/ the Imagineers working on this project because "Andy's Backyard" just seems so...vague. It doesn't help that this feels like an import of existing TSLs (yes, it seems like the attractions are improved, but the theming remains pretty much the same from one TSL to the next).
It almost makes me wish TDO had kept the area Pixar-themed, left TMM as is, and then decided on a completely different Pixar movie for this land...maybe a mini version of the long-rumored Monstropolis or even The Incredibles.
Don't get me wrong, I'm sure I'll visit the area and enjoy it for what it is. The Slinky Dog coaster looks fun. But it just feels kind of underwhelming overall.