I think that Epic Games need to rethink radically generate custom collision to import Static meshes.
You can also do the usual static meshes with the creation of a special material for the collision. Without generations. You can peek algorithms for “Let them tear” engine 
Please do not leave it unattended.
I have moved your thread to the proper location.
Hi ,
Can you be a bit more specific? What would you like to see changed with the generate custom collision option? Do you have specific scenarios or examples that you can provide so I can better understand your request?