I agree with GT75. The MFs at Ocean 22, while a bit higher than some Las Vegas resorts, are actually pretty good. And I also agree that Ocean Oak is generally harder to get into. I know...we tried with less than about 6 months to go. In looking at Ocean 22 right now, there are very few 2- or 3-bedroom units available in the 2018 summer peak season. There is the odd one for only two or three days, but there are no full weeks available until the last week or so of August.
Not sure where you live or the size of your family, but that could be a consideration. If you are looking for somewhere to stay in platinum (peak) season every year for a week or more, then it is usually suggested you buy in that resort. If you prefer to travel around to different places in different seasons, then it doesn't matter where you buy or get your points so much.