I was in disneyland HK in April 2018. I bought tickets online for 5 persons, whether tickets were lunch & dinner included. It was a rainy day, so we prepared also for rain coat and umbrella. Unfortunately one of the iconic palace was under renovation and temporarely closed. Lunch & dinner vouchers are only capable for some selected restourants, if you plan to whole day in disneyland, buying ticket with lunch and dinner included is still cheapest way.