I’ve tried the 1080p footage from the camera as well as the Atomos footage. In my experience, the Atomos footage is always better because it has a higher range. Using the Neat filter definitely helps, but you’re right, there’s just not enough info there for it to work with.
We also had an alternate camera on lock down and it was a Canon DSLR. That footage looks better than any of the other but it wasn’t on the whole time. Ugh.