What according to me helped England come out shining and bossing the ODI game is their bizarre 2015 world cup. That as you said was, one of the darkest, if not the darkest hour. It shook England and made them to do something to regain respect, regain the status in world cricket. They needed a push and they got it there and since then there's been no looking back. They've build up the best way in these four years, they were the favourites at the start of the tournament and they still are. And I believe this is the best chance for them to win the world cup.