Kidman would never, no matter how many years she trained, be able to embody the character of Lucy Ricardo.
I still doubt that she’ll be able to capture Lucille Ball, the person. Javier is also very oddly miscast.
The real question is, how many actors passed/weren’t available? Cate Blanchette is still an unconventional choice, but I can’t imagine that she was first choice.
JK Simmons, in my opinion, is the only decent casting decision made.
I am big. It’s the REVIVALS that got small.