The 'bergers pace up front to me was the crucial factor. It felt like most of the big chances came from them going fairly direct, putting the ball behind an advanced Elliott and their forwards getting to the ball before CB could get over to cover.
I am not an expert on football tactics, but I know a fast, direct attack with accurate passing and good ball control, when I see one. It was a joy to watch.
But consider they have not lost a single goal against over the last several rounds. How good is that. Yes their keeper is good, but their defence held up well.