From my post above: “So long as the maximum potential of options stays below 35%...”
For example, I own a week 44. If I were given the right to adjust the start of my trip by up to one week in either direction, that would impact both weeks 43 and 45.
If EVERYBODY with a week 43 stayed within their week and EVERYBODY with a week 44 slid their start time back towards week 43, then the total number of night for both weeks combined has to cap at 35%.
With race weeks, that’s the end of it because you’re talking about what, five to six non-contiguous weeks throughout the year (that don’t include weeks 49/50 where most fixed weeks are sold).
But. Add in contiguous weeks (like grandfather previous fixed week owners into that flexibility), and the potential overlap goes both directions: Week 43 all books into their week, week 42 all pushes their week into 43 and week 44 pulls their dates back into 43. Three different week owners pushing the 35% limit.
This could be a problem for week 49/50 owners or if fixed week sales take off because of positive tinkering with the formula.
It’s easy to fix but might be more hassle than it’s worth. If you stay completely within your week, you’re automatically booked. That happens now. Sliding your start date back or forward at 12 months is permissible subject to the availability that doing so won’t break the 35% cap of the week that you’re overlapping.
Example, for ease of discussion, a resort has 100 rooms in a category. So 35 of them can be fixed weeks any given night. Let’s say that there are 25 week 49 owners. That means at the start of this process, up to 10 week 48/50 owners could push/pull into 49. In reality, though, 14 of the week 49 owners broke their guarantee prior to the 12 month window in order to borrow their points. So really, there are 24 spots avail for adjustments from neighboring weeks into 49. But if 25 people want to make that move, the last person making the request would have to be denied based on availability. Of course, if another week 49 owners opts out before the 11 month window opens, then the last/next sliding owner has an opening.
That is almost certainly too much work for too little outcome for DVC. Especially if they can limit movable start dates to non-contiguous weeks that don’t include weeks 49/50.