AnimationPlayer track: track visualisation should also visualize Update Mode, Interpolation Mode or Easing

[golddotasksquestions]

Describe the project you are working on: Projects that use AnimationPlayer node a lot.

Describe the problem or limitation you are having in your project:
I was on the fence submitting the track visualization as bug, because it leads to false judgement and shows stuff that is not actually happening:
When you change alpha or color between two keys, the track accurately visualizes the change (see alpha -> white -> alpha -> red transition below). However, when you change Update Mode, Interpolation Mode or Easing, the track visualization dos not reflect the setting, which makes it very easy to oversee a mistake, or simply confuse people. This makes the track visualization imho more harmful than helpful:

Describe how this feature / enhancement will help you overcome this problem or limitation:
Make the track reflect the Update Mode, Interpolation Mode or Easing setting as well, or remove the track visualization all together.

Show a mock up screenshots/video or a flow diagram explaining how your proposal will work:
See above how it currently works. If the track visualization would also reflect Update Mode, Interpolation Mode or Easing setting, we would not see a gradient between keys on the track once I changed the setting from "linear" to "Nearest" (Interpolation Mode), or "Linear" to "Zero" (Easing)

Describe implementation detail for your proposal (in code), if possible:
Impossible.

If this enhancement will not be used often, can it be worked around with a few lines of script?:
Not that I would know.

Is there a reason why this should be core and not an add-on in the asset library?:
It would lead to less confusion and potential error for all users of the AnimationPlayer. Don't download anti-confusion medicine in the library, people!