I have been playing with the Info Summary widget and it does a pretty good job of displaying feature counts for my feature categories and retains the colors of the feature clusters.
I have looked at enabling clustering on the Info Summary widget but am not impressed with the display at this time. It looks like you lose the cluster popup when you enable clustering on the widget.
I want my user to know what filters have been applied without having to go to the filter widget. If I could add a note to the display with this information, then the user would know what data is being displayed.
I hope that helps describe my problem better.
Thanks!