Whats important IMO is that England are now playing vibrant attacking cricket, the sort that was frowned on by Flower towards the end of his reign.
Without going overboard I think that some of the changes have just fallen into place like parts of a jigsaw. Ballance in particular & Buttler have brought a vibrancy that was missing to our batting.
Ref the Aussies, worth remembering that a fair few of their players are the wrong side of 30 & prone to injury. Whereas England now have the basis of a young team again.
I doubt we'll ever find out what truly happened in Australia (there's a injuction out on it apparently) & tbh its probably best left behind. But I hope that England next summer can fully avenge that series defeat & reclaim the ashes.