For those situations when there's the need to work on SRT keyframes separately, that's pratically always, I hate everytime to switch on the timeline (and so I'm not speaking about Animation Editor or Dopesheet), to kinematics, marked parameters, scaling (that for some misterious reason it's impossibile to move the scale keyframes if not just in scaling mode or kinematics ) I always had this image in mind I think it's doable and highly useful that would change and speed up all those visual checks and adjustments expecially when there's a continue selection and keyframing of many animated objects one after the other.
Working, it displays the keyframes (SRT or XYZ) for the active trasform tool in the moment (in the image, Translate Tool is considered being active).
Is it too weird? Well, we are in the wish page, right?...

