I like U to show only keyframed properties. This excludes showing Expressions which is also shown for the existing implementation of U.
BTW, Todd, it will be good to include a backstory to each question that you post as it will provide a clearer platform for folks to see/appreciate the changes/feature requests.
In this case, the change in U has been made cos a lot of folks often only want to view keyframed properties. An additional step; EE is then required to toggle off view of Expressions after pressing the U key.
HTH
RoRK
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