Hi,
There is some improvments that could make visual scripting a must.
I take Unreal 4 example because it's a good example.
1 ) Nodes quick context search
Instead of selecting nodes in the lower menu,
press space to show a quick search dialog with nodes list or type few letters and the search function will propose the nodes beginning with those letters it found.
https://i.stack.imgur.com/2s8o8.png
2) create nodes groups with title and color option
The 2nd one is possible. Use Ctrl + J. You can set title for it too, not sure about color.
1) Shift + a allows searching through available nodes rather quickly.
2) What @adriansnetlis said and individual nodes can be colored.
See screenshot for examples of both in one handy image! :)

Cool, this works like UE4 blueprints : )
Most helpful comment
1) Shift + a allows searching through available nodes rather quickly.

2) What @adriansnetlis said and individual nodes can be colored.
See screenshot for examples of both in one handy image! :)