You can look at the current sailing in the app. (Choose "select a different sailing" and select the dates. The sailings have not really been updated before each week begins on Mondays)
I have been watching the Royal Theater showtimes to plan dinner reservations, and I can tell you that showtimes are different for sure from last May. For example, Sequins and Feathers is at 7:30 and 9:30 on Day 2 this week (actually today) but last week it was 6:30 and 8:30 on Day 2. Overnight Day 2 - day 3 is when the clocks turn back before the first port Day 3.
Also, Sonic Odyssey has been switching days. It was on Day 6 at 6:30 and 8:30 last week, but this week is on Day 4 (also 6:30 and 8:30). Clocks go forward overnight Day 5 - Day 6 Sea Day.
Starwater in the 270 theater is the only show that there have been reservations available for. I saw it 4 times on my New Zealand Quantum cruise and each of the other production shows twice 🙂