I understand and agree that for American audiences they'll need to brighten-up the show. When I saw it in London, I adored it but my family commented on how dark it was and they are average theater going people, not fanatical like myself.
This next part could sound alittle crazy....
This might just be my opinion but you all are suggesting people without thinking how they will look. Mary Poppins needs to have strong facial bone structure. All the Mary Poppins that they have had in London make an impression on you. By suggesting Sutton or Susan, you are missing the point. Mary Poppins can't just be a singer but someone who makes an impression on you.
In any case, Laura Michelle Kelly needs to be brought over here! She is a very capable actress who will be able to tweak her performance to make it 'brighter'. She is trully Mary Poppins in every possible way!
Happy...Everything!
Kaye Thompson