I was winning a game 2-1, got a temporary glitch in my network and I got dc. Its really so hard to get -3 in such situations. I woon other 2 rounds with +6 aggregate. But the -3 i got here ruined me. I think -1 is enough to penalise a dc. -3 is very harsh.
You see, the situations where people have internet problems are rare but the situations where people disconnect or quit on purpose are more frequent.
Before there was no penalization for players who disconnected or quitted so the number was very high. Since they introduced the penalizations people think twice before exiting a game when losing and the rate of players dropping out of games is low in tournaments nowadays.
Power Soccer try to follow the rules of football, which are -3 points with 0-3 score, if I'm not mistaken.