Add proportional editing in the graph editor like blender

In Blender there is a really cool way to move keyframes around, you can select one key frame and turn on proportional editing where a sphere of influence pops up and you can adjust the size. it's great for stuff like gradually increasing the size of the bezier points in the graph editor. here is an example of it in blender
https://youtu.be/hfzfykbbjBw