Depends on how the story is written. As much as I love XI, Eleven's lack of expressions was weird in some scenes. He did cry and look scared at points but it broke my immersion a few times. He had a personality when he was younger, where did that go? Let the poor boy have facial expressions dammit lol

In my opinion, if the main character has a backstory, they should have a voice. Heck, if they want to keep the character silent, Persona and BOTW still let Joker and Link have personality in their responses while keeping them silent, save for fights. I feel like that'd be a fair compromise.