Does this streamer maker have objective proof Roon degrades sound quality? Actual measurements that prove degredation of the signal? If not, I would not put so much faith in anecdotal evidence. What makes this streamer maker the barometer of excellence? Does he have the golden ears? Or is his hearing as flawed as everyone elses? Is his system perfect?
I won't make the case for Roon being the best sounding software ever. Assuming everything is bit perfect and there are no filters coloring the sound, there are many candidates for that title. If you personally like Roon, I would not let someone's subjective opinion sway your feelings. If you want to try something different, implement HQPlayer within Roon.