So I've been testing this formation and it plays really well. It basically morphs into a 433 but is so much better at stopping counters. Only downside is it's not good for hybrids. Set you ST to false 9 and go forward a little more slowly and you literally unlock any defence. During my testing I have not had a game where I didn't score 4+ and I have only conceded 2 in a match. I am not the greatest player but I do try and play real.
Fullbacks must be on always overlap there is enough cover to stop counters using a high line if you just slow them down your men will get back very quickly.
I would deffo recommend it if you like a passing game.