I like her vocals on "One the Record" my only quibble is some of her over enunications but hey! that should make her perfect for Mary Poppins. Good for her I say, let wait and see what she does with the role.
As for all our favourties who didnt get cast.. well think of all the more exciting opportunities they can look for rather than recreate an iconic role thats already been originated on stage by someone else
It also kinda fits with the way they have recast in London. Scarlett Strallen is a lovely Mary but hardly some big star. However she has been around and paid her dues in the chorus. Why not give the opportunity to lesser known performers? Especially as its the show that will sell tickets anyway.