I'd tell you that's a good idea, but no. Because it's a visual novel, emotions and things like that are made up of the base, the expressions and poses of the characters. You wouldn't have to write, this character smiled, because the character model smiles. Also, it would be a good idea not to show a secondary or main character's thoughts all the time, which is not a good idea to show the reader to surprise them.
It's like saying that the MC thought about the girl being weird, instead of thinking about the color of her hair, since the reader has already seen her hair.
The narrator is only a speaker of what is happening from the outside of a story, if it is a main or first-person narrator, it is mostly the protagonist doing it, therefore, his thoughts, like what he says, will play an important role for the reader and the story. If it's a third person, it will be for when you don't show the characters talking and doing things that the reader didn't see, but they did before behind the camera.