To clarify - the 'new' Alice art is from the artist who most recently left. We unfortunately didn't agree on a few things.
Perhaps eventually we'll revisit Wonderland with another overhaul. To do so now, once again, would just anchor our progress. We can fall on the sword in one game aspect and carry learnings into the future worlds, then tidy up afterwards. Right now the focus is producing more 'new' content.
Wonderland artwork aside - the game's mechanics are exactly as we want them. The last couple of Wonderland updates will come through relatively quickly, then we can move onto Little Midgar, carrying our learnings and applying our established mechanics... Not to mention Haro (new artist working on Little Midgar) has the exact style that I'd been looking for.