Triggers for WinRT in XAML additionally to VSM.
Could you add triggers for WinRT like it is for WPF? Without triggers only with Visual State Manager it sometimes needs to put many additional code to make simple things.
Also VSM's cannot be applied to styles and you cannot create a separate resource with VSM to apply it to different controls. So you are forced to override control's template every time and this is really bored.
Adam Wilson commented
This is critical to easing the process of converting WPF apps to WinRT.
It should also be noted that the VSM cannot modify non-numeric values, this makes it impossible modify common used properties such as Visibility from styles. We under stand that Triggers are not very compatible with animation, but not everyone wants everything animated.
You might be interested in the WinRTTriggers library: http://winrttriggers.codeplex.com/