Some suggestions for the team:

1) Fix blurry fonts in WPF 3.5. Saying "they are fixed in WPF 4" is unacceptable.

2) Make WPF, you know, usable from the developer's point of view. Right now it is bloody PITA.

3) Replace XAML with a DSL that is not XML based and that you can actually use without tearing your hair out.

You can look at Cocoa for a little insight of how to properly design APIs.