This is very true - In fact this season (season 4) is the only season that i have started to take the game serious and actually watch games and train players. Last 2 seasons i finished 3rd and won the cup and i never applied a single booster pack! - In-fact i have witnessed my own player scoring 4 goals when he had only 32% health and his moral was below half. Five players last season played the whole season out of position. I think people are too quick to panic when a player gets injured.
EDIT: May I add in those seasons I never had any win bonuses either.