In tracking, I have not seen VWL have an issue at 11 months out any time of year.
A few can be unavailable at 11 months out much of the year: AKV club level studios and 2BRs, OKW GV's in the Hospitality House booking category, and Aulani standard view GV's. As for others potentially having issues at 11 months out:
AKV value studios and 2BRs and BLT standard view all room categories can potentially have issues, and VGF studios have even a higher risk of being unavailable, first and second week of Dec, Dec 23 through Jan 1 (and almost certainly Dec 29 through Jan 1 if you wait to try to book for a start date of Dec 29), Tues through Fri of Thanksgiving week, marathon weekend in January, Columbus Day weekend, the weekend after Columbus Day, and the weekend in first half of Nov when they have the Food & Wine race. Also, those can disappear quickly, like even before 9 a.m. once the 11 month window opens during other times in last quarter of the year, and around holidays and special event weekends during the other nine months of the year.
BWV standard and boardwalk view studios and 2BRs and GVs have a risk of disappearing before 11 months out for some days first week of Dec, late Dec through Jan 1 if your start date is after December 27, Wednesday through Friday of Thanksgiving if start date is Wednesday or after, and the Friday of the weekend in Nov that has the Food & Wine race if your start date is that Friday. There can also be other times in last quarter of the year where booking 11 months out at 8 a.m. online may be important.
VGF 1BRs can have some risk of being gone 11 months out for days in the first week of Dec, and Dec 29 through Jan 1 if start date is Dec 29 or after.