Not sure if this is even possible, but I would be nice to be able to remove Timeline Properties from the Properties list for a scene without impacting other scenes.
In one scene I need to use Rotation Axis (Z), in another scene I need to manipulate the Blur of an object. Once added, these show up in all scenes, even though I only need them in specific scenes.
Why? In one project I had 32 different properties in the list. If I wanted to change the opacity of multiple objects at once, a lot of scrolling was needed to get past the unused properties (and hopefully not choose the wrong one).