Jasmine was not a queen who had power in her own right. She didn't even have full control over who she married, and certainly needed a man. As for marrying a guy she just met, if Aladdin had actually been Prince Ali she sure would have done so. Jafar's meddling was the only thing that stopped it. Additionally, Jasmine is not the main character, unlike the older princess movies.
No, but then again, we're talking about princesses also, not queens. She did stand up for herself and refuse to conform to the mold of marrying whoever she was told. She ran away and fought Jafar to try and defeat him, so she also isn't just a wilting flower who sat on her hands while the big boys solved her problems for her.
Ariel? She fell for the guy without even speaking to him and gave up her greatest talent to change for him. It's my favourite of the modern era princess movies, but it's not a lesson I'd want my daughter to learn.
She also selflessly saved somone's life, and again refused to conform to the standard of what was expected of her because her heart led her another direction. She was curious, inquisitive and inventive, all qualities that are good to encourage in girls.
Rapunzel went for the first man she ever even met.
So because she didn't play the field for awhile she's not worthy? Nope, she was also self sacrificing, and showed great courage and faith in people.
Belle? She was effectively imprisoned by a guy who controlled whether she lived or died and somehow fell for him. Another awesome lesson. Besides, as a prince the beast is just boring.
She fell for him because she looked past the gruff exterior and saw more in him than what his "skin" showed. She showed courage and intelligence to stand up to the whole town who thought she was strange, and she followed her heart, again, qualities that should be encouraged in young girls.
Pocahontas and Mulan are better, and also get far less exposure than those listed above and than Snow White, Cinderella and Aurora.
Tangled and Aladdin were both attempts to pull boys in too, so the "prince" had to be something more than a one dimensional character who kisses the princess and marries her.
I love Disney movies and my kids do watch them, but I don't always like the messages they send to young girls. I really like the messages my kids got from Frozen.