It's open since I think maybe November of last year?
And yes, it's where Ariel's meet-n-greet used to be.
I'm pretty sure as of now the only place you can find Ariel is with some of the other Princesses in DCA at her restaurant .
Yep, you can meet Ariel in her very pretty teal dress (aka human form) at PFF in Fantasyland. The princesses rotate, so there's no guarantee when she will be there.
It opened end of Oct. DD and I wanted to do it, but it was ALWAYS 2+ hour wait to meet her everytime we asked the CM, so we opted out of waiting that long.