Of course it's hard to judge from concept art, but as of now, I actually kinda like the look.
I really like the general shape, with it being low and wide on the bottom, and then soaring upward, with one distinctly tall spire. That's good, really good! SDL's doesn't do that right. I think this castle feels far more majestic.
It's got a kind of funky vibe to it, which I like. Sure, it almost looks a bit scary, with those "Kremlin-inspired turrets," but overall, I feel that it's got a pretty unique style. And uniqueness is good, really good!
I do wonder, with this change in style, if it'll remain Sleeping Beauty's castle. Perhaps she will be evicted and it'll become a princess sorority home, like Shanghai's.
But overall, a unique castle is better than a clone of Disneyland's original. A small castle can be seen as "quaint" in a park that's full of history and legacy, built by Walt over 60 years ago. It is simply small in a park built barely over a decade ago, especially compared to big brother Shanghai. I think the castle change will help bolster the park's reputation and drive attendance in the years to come.