They will eventually need to have more than just the one itinerary for Oasis class ships. With 5 OA class now thats one in for a drydock every year.
I must say that they did time the deliveries of the big girls well.
2023 Symphony
2024 Oasis
2025 Allure
2026 Harmony
2027 Wonder
2028 Symphony
2029 Oasis, Icon, Utopia
Things start to get crowded in 2029. maybe Icon gets delivered very late 2023 then you have
2028 Symphony, Icon
2029 Oasis, Utopia
They have a few years to figure it out.