Personally think it will get utterly bodied by several teams in the UCL, like the year the german teams smashed the spanish teams on the counter.
Not sure on the stats but swear I heard there has been more mistakes from playing out from the back than there had been in the previous give seasons.
The risk doesn't seem to outweigh the reward.
I do think there's a decent general idea there. It's all about retaining possession from your goalkicks and then building up the play through midfield, rather than just punting it long from a goalkick and it being 50/50 every time over whether you retain the ball or give it back to the opposing side.
The bits that cause the mistakes are when the defenders with the ball prat about with it for far too long and get pressured into making mistakes, especially if the opposing team press very highly. It's all about getting the ball from the goalkeeper, to the defence and then moving it forward promptly to the midfield and attack.
I hate the stupid passing that takes place these days between a centre back pairing, only for the keeper to just boot it long anyway. De Gea does this every fecking time.