This is a feature I am very much interested in implementing in the game myself.
In addition to the morale boost you mentioned I think having appropriate cutlery in your inventory or near you when eating should also slightly increase the time it takes to eat a meal. The trait Rigid Table Manners should also give a hefty morale penalty for eating without cutlery.
Appropriate cutlery:
- Spoons - increase morale and consumption time when eating soups.
- Tablespoons - decrease coffee and tea preparation time.
- Forks - increase morale and consumption time when eating solid food.
Link to related discourse thread: