If you had gone with the standard 4-4-2, which is my proven counter for 3-4-1-2, you might have scored more or allowed less goals. Hard to say. 4-1-4-1 is most likely the next best formation but anytime the opponent has 3 DC, it is better to have 2 ST.
Even a 3-1-4-2 might have been better for you. try different formations and ask the forum members and you might be better prepared for the results.