Alright, I hear you. I don’t know which model makers you have conversed with. I only have a source which may or may not provide some comfort for you.
In this thread, one of the paragraphs states exactly this:
The model editors Blizzard uses to make the new models, will be available with the new World Editor[4][8]
There will be tutorials to these new tools[4] and guides to make the custom models look the same as the Blizzard ones[8]
So, I wouldn’t worry. It seems to me that it’s only a matter of time before a new wave of model creators rise up with quality work befitting your innovative needs. I do think it will be a new wave, and that some existing creators will see their works fall into disuse, but long as they’re willing to adapt to Reforged’s new development environment, they’ll be fine.
I would use the many new models and skins introduced by Reforged in place of the Hive Workshop SD models for the time being, were I you.
Also, check these out. Just some custom models already made by the community in Reforged’s new environment. https://imgur.com/G7Gti5P