Hmmm interestin. Played on a bit, and got as far as 5 wins in a row using this. What is noticeable is that it is much more stable defensively. Here are my results from 10 games before (using 4222) and then the 5 game streak:




Can see in general the games are much less high scoring. Three things stand out for me:

1) I have the WB set to "join the attack" but at times it feels they dont, or at least are very slow to do so. This adds defensive stability obviously, but also blunts the attack somewhat

2) The movement of my strikers feels really good in this formation, which is wierd because they have exact same settings, same players as i used in 4222 and in 41212 and they didnt move at all well. Makes about as much sense as the rest of fifa

3) with this formation my pass completion % takes a big spike - been 89 - 92% during that streak and at times before it was down in the low 80s, and at best 87 or so.

I am not gonna rebuild my team into this, because i know fine well it will just suddenly stop working, but nice tip that has helped my WL. Cheers @KezzaJ and the others who posted