All Class is a very good ranker, very fair. It's the hardest of all the rankings you have to try to follow 5 times more kids and often the top kids never face each other. So feeding him information is a great thing, the best way is by email. When I did rankings I appreciated when people recommended kids for the watch list, also where ranked head to head matches will occur.
He's not going to ignore a result, he might not agree with your assessment but it will be carefully considered.