I can (anecdotally) confirm the overclocking sensitivity. Although it seems to be more that this game just REALLY pushes hardware if you let it which is naturally gonna draw out overclocking instabilities.
I think the silent protagonist choice is valid in more of “sandbox” story like BG3. Speaking for myself, voiced protagonists tend to “lock” me into a specific character. I absolutely love the voice acting for Geralt of Rivia but when I play a witcher game I’m not inserting myself into the game, I’m becoming Geralt and making choices based on how I believe Geralt would make them.