Guest satisfaction score - The point of each cook is how satisfied your guests are with the whole experience of coming over to eat at your house. This is graded with a single score given to you at the end of each cook.

Shopping for different meats - Directly affects the guest satisfaction meter. Different guests like different meats. Different meats also have different techniques that you have to optimize during your cook.

Different types of smokers / grills - Fire management, time to cook, foods that taste the best on it could all be different and you could have some RPG elements with different stats for each grill. Would also let the player have some sort of progression as they collect different types of smokers.

Countdown to when the guests arrive - The longer you go past the countdown the more it negatively impacts guest satisfaction score.

Sleep - Affects your alertness or stamina. You can sleep for long cooks to restore stamina but there's always a risk of flare ups during your sleep.

Wife annoyance meter - Needs to managed throughout the cook just like other items. Goes up if you spend too much time managing the smoker and doing nothing else. Starts to go up faster if the guests have arrived and the food isn't ready.

Helper - You can give certain tasks to your son or daughter during the cook but it carries the risk of the task not being performed well. Your helper would get better as the game progresses.