So for face, I have two ideas:
You have to put on a mask for different situations, and maintain that expression on the mask for a period of time. For example, you have to maintain a smiling expression while you’re working at a cashier, or you have to maintain a sad expression during the funeral of someone you never liked very much.
Your nose is running and the rest of your face has to to catch it. Use eyebrows and mouth to control two different things. eyebrows to make your character jump, and keep smiling to make your character run.