I'd agree with your take on winter dreams. I'd be more harsh on celebrate though. What the original lacked in storyline, it made up with heart. Seeing a 70 foot tall awkward host (no diss on NPH, but just about anyone would be awkward in this setting) flying in front of your face is weird. They tried to push the medium in a whole different direction, and unlike other more unique offerings such as Illuminations, failed miserably. The show was just... off. I will respect the fact they tried to do something different. That deserves credit. I also have mixed feelings saying they should go back to the original, as the parks aren't museums and I want them to feel safe taking risks. It's just sometimes risks fail and it's better to cut your losses, especially when it's as simply as changing some programming.
In general my complaints are mostly with the feel or story. I actually thought I saw the animators and show designers having a perfect technical control of their craft. WoC Celebrate's effects are just amazing. I feel like the designers have been playing around with the hardware for 5 years and now really understand it. Like landscape artists who are masters of their craft. The sad thing is instead of being instructed to paint a landscape, they had to paint a wall. Their subject matter was really bad. That's my main issue.