1. That problem occurs with Unity3d 5.3.4f1. And SLATE version is latest (unitypackage size is 345,404bytes)
And I can’t find version information SLATE window or txt file.
2. For a while, I will use that preference. And I expecting new version 🙂
3. I agree with your original thought.
But I think some case If x,y,z values have big gap, some curve will hard to edit exactly
For example, if x 0~1, z -1000~1000 then It will be hard to edit x value on a CurveEditor.
But sometimes want to see 3 properties like your thought.
So If you choose to make the filter, That need some options (ex: All, Filtered…)
You may reference 3dsMax’s curve editor