These are my fully developed thoughts on the redesigns.
1) The Atrium
I like the brightness this space has. The new curtains are very nice as well. At first, I was weary of the removal of the starboard stairwell, but I now feel that it was a good design move. The new carpet on the stairs is simply too blue, overwhelmingly so. Similarly, the main floor carpet does not seem to fit in the space. I feel it would look better with Ariel, on the Wonder.
On to my biggest disappointment in the space, the chandelier. The rendered chandelier looks horrid, to be honest. It does not seem to flow with the rest of the space. I am shocked that the Festa Venezia I is being removed, though a tad dark at times; I feel with minor lighting adjustments it could be made brighter and more inviting.
2) The Adult district
Keys and O'Gills look amazing. I believe they will be very popular.
I am not sure how I feel about Fathoms. I like the space, but the renderings make it look dark and smokey. I think this is just the rendering and the space will be very nice in completion.
3) AquaLab
This area looks very fun! However, I am not sure why the Mickey pool is being removed. The blue deck treatment looks similar to pool decks on other cruise lines(Royal Caribbean International, for example), and I am not impressed. I feel something different could have been done here that would keep the classic feel and incorporating modern details.
4) The Youth Spaces
The club and lab renderings look amazing! I would have loved to play in these spaces as a child. Good job! I would like to see what is being done in the teen and tween area as well.
5) Carioca's
The first rendering I saw was overwhelmingly white. However, the evening render looks warmer and the central light fixtures being on helps with the white. A friends of mine commented that the costumes were very shocking, and I agree. Perhaps subtler colours could be used. Overall, I like this redesign.
6) AquaDunk
I am shocked that the decision was made to add this type of slide to the Magic.I feel the slide, though red, will take away from the aesthetic lines of the ship. I like the idea of the slide; it looks really fun, but it's placement in questionable. Much like the Dream and Fantasy, more supports will be used than rendered and there will be a lot of clutter in front of the funnel. I feel this slide, or derivative, could be placed without ruining the lines of the ship.
7) Other spaces not rendered
I am perplexed at the change from Studio Sea to D-Lounge. I am not sure why this change is needed. I would like to warn against creating the same spaces on all four ships, as each should have her own unique character. The same can be said for the redesign of Animator's Palette. I like the new design on the Dream and Fantasy as well as the original design on the Magic and Wonder. Upgrades are needed, but I don't feel that the design should be changed to be just like the Dream and Fantasy. Some variation is needed.
I would like to believe that the Walt Disney Theatre will be receiving some TLC during this dry dock as well. A complete redesign is not necessary, but maybe new upholstery, or something, just to refresh the space.
The rendering of the spa I saw was amazing; it looked very calming and welcoming.
Overall, I like the designs, but I feel that not all angles were looked at carefully enough.
Both of my teenagers and myself would be able to ride it. 
The AquaDunk is maybe a little intense for me, but perfect for DH...so we would all be happy!
