Yeah 4.5 definitely improves a lot, but I can still hear washiness in the high end. Probably not noticeable to most in isolation or poor audio devices like low-end phone speakers, but would be very noticeable on a good soundsystem in a playlist with professional songs.

It still doesn't capture meter or phrase structure well in classical songs, and there are a lot of weird artifacts. It's better than the old models, but there's still a long way to go.