The keyframes displayed in a clip in the timeline should auto-scale. Take this example:
I have a clip in my timeline with an animated gaussian blur on it. It starts at 0, then after a second it ramps up to 60. In the timeline, if I right-click the clip and do Show Clip Keyframes > Gaussian Blur > Blurriness, I see the keyframes. But there appears to be no difference (in the y-axis) between the "0" keyframe and the "60" keyframe. Ah - I realise why - it's because the Blurriness value can go all the way up to 30,000, so the keyframes are displayed accordingly - ie. there is an imperceptible difference between a "0" keyframe and a "60" keyframe in the grand scheme of 30,000 things.
I suggest that the keyframe graph displayed in a clip works just like the graph displayed in the Effect Controls panel - it auto-scales to show the lowest value at the bottom and the highest value (be it 60 or 30,000 or whatever) at the top. All other valeus are plotted accordingly in between.
By the way, what is the purpose of "Add Effects..." under "Show Clip Keyframes"? It does nothing. It would be great to be able to display multiple keyframes in here - for example if I'm keyframing some reverb, I'll often want to adjust the dry out and wet out levels so they 'swap over' at the same time. I have to do this using two separate keyframe graphs (in the timeline clip) rather than seeing them all at once.
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