I enthusiastically second this request! Especially the need to have total artistic control of the denoising process.
Unreal with DXR/RTX features could easily replace my rendering pipeline for non-photoreal projects. I assume it will be a while before it can compete with Arnold/Vray/etc. for pure rendering quality but that’s not something I need for the majority of my video projects.
I can’t speak for Epic but I’m sure they’re interested in offering all of these features. Just a question of resources and time I assume. They seem very committed to offering solutions for the film and cg industries.
I’m eagerly awaiting any kind of specific roadmap or documentation for their DXR/RTX implentation. As soon as there is a working implementation, it will be time to order an RTX card.