Whats unrealistic about it ? If you search the history of real , proper football you will find that at one point in time , might have been 1940- 65 , there were a lot of teams that set up in a 2-3-5 formation to play highly attacking football. In fact when I first started to play that was the formation we used. What was surprising about it was it was only not too bad defensively as your midfield could sit back a bit to help defend as they werent needed a lot in attack and maybe I missed the bit in the rules where a formation like tis cant be used. Could you please show me where it is written ?