Alright, after seeing the Chespin evolution and seeing better-quality pictures of Delphox and Greninja, I have this to say as my updated opinion:
Delphox is looking a bit better, the sack-dress is looking a bit less like a sack but still after seeing Braixen it just fell flat. And I'm still disappointed at the lack of a wand; they could have done so much with that!
Greninja looks great, even with the tongue-scarf. But the bubbles! I miss them! They were so cute and unique! They could have worked with that, and I wish they had. It looks great regardless but it's sad to see that Froakie and Frogadier had something that was just abandoned in the last stage.
Chespin...its final evolution doesn't look bad, but it's nothing that exciting to me. I'm very neutral towards it.
I think that's the biggest problem for me. The first stages were great. The second stages were 50-50, but second stages usually are. They looked like they were going in such a great direction and ended up just falling flat. I didn't really have high expectations but I still feel just a bit disappointed with these designs.
All I can hope for now is that:
A. The official art looks great
B. They look better within the context of me actually playing the game
or C. The animations are good enough to make their designs work
So ultimately I'm hoping for an official reveal, and soon. I feel like I may be judging them harshly simply because they're being revealed to me in the context of a leak, and context DOES make a world of a difference.