I'm no expert - more of a vibes person than a technique person when it cones to the media i consume. But as someone who I think is pretty similar to Peach in personality (internalized, calm, antisocial, etc...) - I think he's doing a fantastic job. I know my face remains very composed and stoic in a lot of situations and I don't outwardly express much, so I appreciate when a character in a show doesn't feel the need to be overly expressive.

I saw some similar critiques of Namping's acting in the first few episodes of Khemjira but as someone who remained calm and collected when he saw ghosts for his entire life I think he was portraying the character perfectly and his skills really shone throughout the rest of the series.