R.
Don't agree....i real Formula 1 is it the same....
In real F1 the DRS is necessary because of the problems created by the aerodynamics of the cars that precede.
The cars leave behind a very disturbed trail, and the car that follows instead of using the trail to overtake is penalized, the result is more difficult overtaking, that's why they invented the DRS, but it is also very contested in the real F1 .
### I think that the DRS is ok only during the battles for the position, and it should be forbidden to use it on the last lap, and it should not be used to overtake the dubbed cars. ###
Who is behind and finds traffic, instead of being slowed down, at the time of DRS is instead very advantaged, who is ahead and has no traffic can not use the DRS and turns slower, the result is that many times (especially at the end) the gap gained lap by lap is lost because those who followed could benefit in all the DRS rounds.
Too many times risk losing all the work done, lap by lap, because those who follow use DRS and sometimes even with KERS.
(Sorry my bad English, Google translate writes for me XD)