All very good points, and I suppose she could have been in a small roll. I guess we just have to allow her to want to remember her first and very successful start. I was looking at it, I think, as the most common remark I have heard and that was that they could never remake Mary Poppins. And since that wasn't the case, they couldn't have used her as a lead. And why settle to be the balloon lady after being Mary Poppins. Just leave the original memory unblemished. Van D yke worked because he was playing basically the same part he did in the original when made up as an old man and it was played more for comedy.
The excuse that she didn't want to cause Blunt problems was bogus. Julie was Mary, she created that character physically and used Disney's spin on it. She had nothing to gain by having audiences feeling sorry about the aging process and believe me we all come to the age when we no longer want to have any real limelight or be reminded of the passage of time. I think she made the right choice. After all, the original movie wasn't titled "Bert" or "Jane". The movie went out of its way to remember Julie in some of the mannerisms and even the semi-duplication's of some scenes that Julie had made famous. Psychologically, even for audiences, to see those tributes and then see an aged Julie as another character would have been more depressing then then joyous. I know it would have been for me. Some memories just shouldn't be altered.
I can relate in that way to Julie's inner self awareness and concern. I don't think she disapproved in anyway because Emily played the character closer to the books, personality wise and it made it's creation nothing less then the fact that we now had two Mary Poppins movies worthy of seeing. Now if we had been talking about a remake of the original, I would agree that it never should have even been thought about much less made.
I just heard that the movie picked up by almost 20% in it's second week. Hopefully word will get out and like the first one, will become a must see for everyone.