When my DD was 4, EPCOT was her absolute favorite park other than MK. There are so many princesses there, plus Alice and Mary Poppins. Also, that is the only place to meet Anna and Elsa. Plus, it also has the Frozen ride. There is the Nemo ride, the Figment ride, Living with the Land, the boat ride in Mexico, the Kid Cot stations, the entertainers throughout world Showcase (drummers, acrobats etc.). If she is tall enough mine really enjoyed Soarin at that age. At age 4, my DD did not care for AK at all because it did not have a Princess presence, and we have a really good zoo at home. She had no interest in spending time looking at animals when she could be meeting princesses. Within an hour or two there, she was always begging to go back to MK or EPCOT.
When DD was that age, she cared more about the Princesses and characters than riding rides. That was what was important to her. If you can get a reservation at Cinderella's Royal Table, there is something magical about eating in the castle and meeting the Princesses there.
It sounds like your DD is Princess meet focused. I would highly recommend subscribing to Kenny the Pirate's character locator. He gives great tips about the best times to meet the Princesses, when to line up for the shortest lines etc. You have to be careful at EPCOT - or anywhere that characters come out in sets rather than being out all day- because the lines will get cut off. I can recall one time we got to Mulan's line right as she was coming out for the meet and greet and the line had already been cut off. You typically want to be in line at least 10 minutes before the character comes out for the Princesses in EPCOT. Kenny's locator helped us for YEARS-- definitely worth the money!!!
Have a great trip!