When creating a custom animation for an element or page trigger in the animation section It is a little confusing especially for new users.
One thing that would go a long way towards starting to cleaning up the animation UI would be if you create or select a custom animation, all the other custom trigger options should disappear. This would work a lot more like when selecting a standard prebuilt animation. So it will pretty much function more like a drop down list and less like a big long list of radio buttons. Because currently the more animations you add to a project the more confusing and overwhelming it becomes. It took me a little bit of time just to figure out what I was looking at when I first started using this tool.
Simplify The Animation UI is a great idea!