I’m really hoping that in some part of the mini series they show and explain why Chief never removes his helmet in lore. Obviously not showing his face adds the shroud of mystery to the main character for the player… but with the recent iterations of Halo, it shows every other spartan taking his helmet off. We’ve seen Blue team, with each member not wearing a helmet… except chief. He is also one of the few characters without a last name (hunt the truth showed the file with the children candidates, and John’s last name was blacked out. Seriously?)
Neither of these are big issues, but they are slight holes in the plot.