I feel that Bernadette was doing really really good work in the role, and she was great, but she definately had to work for it.
It's not a natural fit for her. Which is why it was interesting. I wasn't necessarily impressed by her performance (while I did like it, and was in awe of her presence) until Rose's Turn.
She absolutely nailed it, but for the rest of the show, she was just plain good.
Patti's natural brazen nature lends itself more to the part, and it just makes a little more sense on paper.
Peters was like an odd experiment, and not one of the first people that comes to mind for the part, but I have no regrets in seeing her.
But I think Patti might be better. We shall see.
Personally, I think I have too much bloom.