I wish these were added to splitters and mergers:
1. Stackability, to place them on different height one on top of another
2. Item filtration, to not have to use do many belts to separate items
3. Advanced splitting - we can choose that f.e. the direction change happens after 5 items go left, 1 Goes straight and 2 go right, instead of 1:1:1 proportions.
4. An ability to lock/hide the extra exits/entraces to them when we dont use all 4 holes, it would look a lot better as a triple with one side flat.
5. Add a timer to them - 5 seconds of flowing straight then 1 second going sides. Kinda extension to the point 3 to make it easier not having to count exact number.