I've always liked the RX, and at least Lexus has resisted the temptation to grow it. Has always appealed especially well to females size and design-wise, and should continue to.
I with the rear window rake weren't quite so strong (figure they can compete with the EX/FX/X6 coupe-like roofline with it no doubt), and that the front bumper had a little more aggression in it instead of being so plain. The interior with its full centre console gives more of a sedan impression than before. Man I hate Lexus' trim level naming convention, so confusing with each level intended to sound exquisite.
Overall, very much an evolution, that not being a bad thing. The formula continues to work.
Any pricing yet?