Yes, you get oceanview but ONLY if in the 12 - 8 month window,otherwise you may get an island. That's my point, I own oceanview BUT only if planning 8 - 12 months out am I assured we will get what we own. I think the owners in Maui should get the views owned.
With Marriott(KoOlina), if you own oceanview,you can reserve at any time if an oceanview is available, not tied to 12 - 8 month, and you know you will get an oceanview. Actually you can do this online with marriott so can see availability on calendar. And yes, there is availability less than 8 months, actually we have reserved with less than 4 months and got what we wanted. Sometimes we need to do a Sunday, or Friday instead of a Sat but that's not a problem for us.
Using online calender for reservations is also helpful if trying to coordinate, e.g., ff tickets,trips with family or friends, Maui and Oahu vacations
More information is better information