Ive tested the original version in 1 friendly match on fm2013 as Bayern Munich. Its only pre-season 2019/20 and was trying to find a tactic to take advantage of the huge amount of excellent midfield options they have. Seems to work but havent ried it against a good side or the tweaked version
Someone mentioned this tactic struggles against fast wingers. Found that to be accurate. Just make your defence sit a little deeper, did the trick for me when i was 2-0 down vs Koln. Finished 2-2 and shudve won in the end.
Also, this tactic does totaly destroy weak teams.