To the best of my knowledge, there is no association between timing of review by the Board and CVWs. If anything, CVWs are offered AFTER your review because that's when USNA knows if you're a well qualified candidate.
CVWs exist primarily for the benefit of candidates. Some have said that there are write-ups done by your host, others have said this doesn't happen. It may change from year to year. Regardless, unless you spend the entire WE telling everyone how much you DON'T want to come to USNA or other otherwise totally socially inept, any review of your WE is unlikely to make much difference.