Hi donka, Dave,
When we edit a complex composition with a lot of short episodes, situations with a lot of key frames are inevitable and prevail. One short line with their linear placement is not enough. Therefore, this problem should be considered in two stages:
1) What temporary solutions
will help to facilitate work in such conditions.
As a temporary solution - the level of points can be raised above the figures and not making the point large.
2) How it is necessary to rebuild and supplement the editor of key frames so that the actions are convenient.
This bicycle has long been invented.
Just look at the Scene Editor in LightWave or Graph Editor Modo
I'm not saying that developers need to do this in the same complex way, but the basic idea is how to visually and conveniently work with data matrices there is enough. Considering that in the end we are striving for a more complex system of key frames in layers. And in this context patches can only be temporary.