Wait and see...it will be enforced, just as it has been enforced in years past. Ask them to post here again after re-reading the rule. They will more than likely change their tune.
Long sleeves are not allowed by rule, tight fitting or not. Some where probably allowed to wear them last year during the regular season simply because the official didn't know the rule. It was strictly enforced at the state tournaments last year. Unfortunately, contrary to your beliefs, not all of the officials know all of the rules.
Excuse me while I go give my donkey a bath.