She has very conflicted feelings about Evita. One minute she's saying what a bad show it is, the next minute she's saying how the movie could never measure up to the greatness of the show. Maybe I'm imposing my own feelings here, but I think that what she's saying is that, although it's the strongest score Andrew Lloyd Webber wrote, it's very slight material that was greatly elevated by Hal Prince's direction. The movie was unable to lift the material in the same way.
When I see the phrase "the ____ estate", I imagine a vast mansion in the country full of monocled men and high-collared women receiving letters about productions across the country and doing spit-takes at whatever they contain.
-Kad