Turn the Timeline into a Dopsheet
I'm not a huge fan of using the timeline in such intensive way as it is right now as it can get so cluttered with all the twirled open settings. I would rather prefer having dedicated panels for all the individual tasks.
So that we would have a transform panel(much like the transform effect) for altering so settings, a panel for adjusting and animating shape layers/masks, a text panel to add and adjust all those text effects, .....
As soon as those settings are altered the parameter becomes exposed in the timeline and there you could just adjust the timing and interpolation turning the timeline into a dopesheet.
This way the timeline would become cleaner and more easy to navigate. Cinema4d and all the other (node based) compositors use this approach and I much prever working in their timelines.
AFX would make a step towards being more user friendly in my eyes closing the gap to the Node based Compositors ;-)
Michael Szalapski commented
You're not asking for a bunch of different panels, right? You're more asking for an attributes panel where the contents of that panel are the controls for whatever you have selected?