I, for one, understand what you are getting at.
But, you have to remember, a good chunk of gamers (myself included) are more susceptible to a low, fluctuating frame rate.
In fact, a friend of mine has the same thing with anything below 60, and has pc set ups that can consistently hit 80+ frames on even the newest games. Anything less and he gets a headache the same way i get it at 20ish.
That is why we have the unsaid rule of 30 frames on consoles in place. It is ,on average, the very minimum required to get a smooth and fluid image experience. Anything less, again on average, and you start to see for what it really is, a series of still images shown in rapid succession.
Now, your threshold is obviously lower than that, and bless you because that is almost a gift from the heavens.
But surely you can see that for a select few of us anything less that 30 is not just "unimportant cosmetic stuff"? It pulls us out of the illusion if you will, and it just isnt enjoyable, or even playable.
On a sidenote, it also affects gameplay, trying to fight effectively in the bog for example becomes almost a chore. Everything feels delayed and slow and "off". Well, for me anyway.
But, in the end there should not even be a competition on what get fixed and whatnot etc.
Everything should be in a serviceble state.
This is my first CDPR game, and before i purchased the game i noticed on various forums and web articles that they have quite the impressive streed cred amongst gamers, so i am not worried. Heck, if they want to fix quest bugs first etc and tackle the frame rate last, fine and dandy with me. As long as they do look at it.
Anyway, my 2 cents, brother
enjoy the game.