chiming in late...
I feel the same! In fact, the CCV has been my main go to amp for low tuned metal stuff. I initially boosted it with an sd1, but while tightening it to my liking (Bb standard), the boost also took away the high end hiss. The amp still sounds great like this, but more generic like so many other high gainers, so I settled on pre eq to tighten things up and at the same time retain that angry breath of the CCV. And, nice side effect, the amp clears up so much better with the volume knob now...
But
@Thomas Obester , I get you: If your ideal audio production is rather clean, the hiss can be something not adhering to that sound ideal...
I for one like some wabi sabi and perceive authenticity and character with the CCV hissing ....
At the end of the day, I believe we have a magical tool box in our hands with a limitless palette of colors it seems...