Last season I finished eighth and was automatically relegated, despite winning my last game of the season by 12 points - against the seventh placed team. I ended up missing out on seventh place (and thus a relegation playoff, and the chance of survival in the first division) by only a 14 points difference. In other words, if I had won by 20 instead of 12 then our positions would have been reversed.
I played CT to try to win the final game by the biggest possible margin, but once my team had achieved the desired 20 point lead, the coach rested my starters and so the lead was cut again, even though I was screaming at the coach to keep playing at full intensity. Coach was presumably happy with a 12 point win. I was miserable.
A tactical option to turn off the 'resting' and go all out for the biggest possible win would be useful in situations like this, and would do no harm to those who don't want to use it.