Those changes may have been wanted by many corps directors and therefore have been used as soon as they passed, but how many times has the woodwinds rule been proposed and not passed? There is also a rule currently allowing corps to just amplified voice. This past year, if I remember correctly, a minority of corps competing used amplified voice in their shows. I'm not saying that no corps will use woodwinds if the rule passes, it just might be the minority like voice has been.