But what if we could customize the inserters points of origin and destination? You could even allow many movement combinations. And for smart inserters you could set a filter for each movement, and maybe a ratio of movement as well.
An image is worth a thousand words, this is what I mean:

And for smart inserters imagine that there are filter icons over each white line, and maybe a percentage indicating how much time of the inserter is dedicated to that movement.
What do you think?