Hi richy25, thanks a lot for sharing this tactic.
In my long-term Dortmund save I play a very similar formation with great success.
I generally enjoy 4-2-4 formations so I decided to download yours and give it a try. However, I don't have any good DM since in my 4-2-4 i play with 2 CM. So I just loaded up your tactic, pushed the 2 DM to CM (support) and went to town...
Results:
against Austria Wien (away, Champions Grp. stage) 8 - 1
against Freiburg (home, German 1st Division) 10 - 0
against Ajax (home , Champions Grp. stage) 4 - 3
against Bayern Munich (away, German 1st Division) 3 - 1
Very nice results but above all some really nice one-touch football! Of course one has to bear in mind that I'm in 2019 with my Dortmund save and my squad is a really strong one. Furthermore, with the 2 DM moved to CM in addition with the high D-Line the tactic becomes very offensive / risky.
Again, thanks for posting will definitely toying around with your tactic. The football played looks really really nice...