Decals (geometric and projected) and POM are the reason why I`m looking at Unreal or Fstorm. We used them extensively when working on Homefront: The revloltion (made with cryengine).
They are a quick way to add damage, dirt, markings, puddles, posters, edgwear, cracks, flat elements, ..
They are highly reusable.
They fit in your ideology of "Ease Of Use" (
https://corona-renderer.com/features/ease-of-use)
And i`m tired of trying to achieve similar results with distance maps or ambient occlusion :)
And all though the displacement in POM is not real it does a really good job most of the time.
BIG +1 if this could be implemented.