Yes, Mike Isabella, the only one with immunity, should have been the
only one at the front of house. He actually didn't need to make a dish at all. Not quite sure why they even needed an expediter. The Dim Sum places I've gone to in Chinatown, it's just the people who push the carts, load the carts as the food is ready & off they go. That should have been Mike's job, loading the carts, not talking on the phone, saying to send up more food. That part should have been constant.
I'm also not sure WHY the chefs were only making 25 dishes at a time thinking that was enough? Haven't any of them been to a Dim Sum restaurant?

(They are Top Chefs, so I think they should have been familiar with one. I can understand that [general] you may not have been to one.) At the end of a meal, our table alone would have 15 - 20 dishes, plates & steamers, (depending on how many people at the table.) The waiter has to count up all the empty dishes to figure out what to charge us. (Each size/color of dish is priced a certain amount. Like all the dumpling dishes might be $4, bamboo steamers may be $6, oval dishes a third price, etc.)
All the tables had about 8 -10 people. So
each table needed enough of each dish to feed every one at ONE table. Carla placed 3 spring rolls on one plate, that meant one table needed 3 plates all by itself. Plus, (in reality,) who eats ONE spring roll?
Some other dishes, I noticed only had one single item on each plate. One chicken foot is not going to feed 8 people, even if they were eating them. Since a chef was only preparing 25 dishes with a single item. That meant only 3 tables got served before the carts ran out of that dish.
No wonder why "Daddy," as Carla called Tom, had to go into the kitchen and yell at everyone - not that it seemed to have helped.