I've seen Dupont in a number of things and have not been impressed at all (your mileage may vary, of course). I don't know, maybe one has to see some of these performances live to better appreciate them.
To be honest, I find Froustey a million times more appealing and engaging than many of POB's principal ladies whose performances I've seen online. I can't believe that she was passed over for promotion; that those other said ladies were considered superior. SFB had better do everything in its power not to let Froustey go; she is a treasure.
Froustey has not performed well in the Concours (she even says that in the Pointe article). And the Concours is how you get promoted at POB. She's also a very emotive actress, in the style of Isabelle Ciaravola and Clairemarie Osta, both of whom were promoted very late in their careers. If you look at the dancers who have been promoted rapidly in the past 10 or 15 years, such as Aurelie Dupont, Dorothee Gilbert and Amandine Albisson, their style is fairly similar -- and quite different from Froustey's IMO.
I'm glad she's finding success in the US. It was depressing to continually see her onstage in demi-soloist roles.
Actually, I recall reading some reviews and comments of POB dancers' performances abroad (galas and tours and what not), and none of them were very effusive at all. They all went something like, we were expecting great things from the famed Paris Opera Ballet and this is what we got instead...