Yes, I feel it's healthier to be in the headspace that its better to hope that the new ride is good because it is coming one way or the other! I just wish every time something new was revealed it wasn't such an exercise in hoping that this isn't representative of the final experience.
As for the theming, I do agree that being too pedantic about everything being wholly immersive doesn't get you anywhere as, for example, the stores in Frontierland do have cash registers! Again, we can hope the mural looks better in context once it's all finished.