Yes, your finding pretty much match mine. However, DO NOT use deblocking to try to sharpen the image, that is not what it is for and it does not work for this use case.
You can get more and more advanced for better results but it will take more time and there are still downsides. Noise and detail are hard to discriminate and denoising video is not a solved problem.
I like the motion compensated temporal denoising techniques, but they are slow.
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