Elements of War

Set in DH, what if a lot of factors that lead to the war being won were different? What if Harry, Ron and Hermione found out Snape was 'good' beneath it all earlier? What if Lupin and Tonks and had much bigger parts to play? What if Narcissa Malfoy helped Harry out a little more? Basically this is an exploration of what small things could have been different, with a big impact.