The opposition quality seems to be determined when you entered the event. I've changed starting line up and subs/reserves, but the oppositions' quality seems to be constant.

So I'll probably play the last 2 games in the final hours. In the meantime, I'll try to prop up my DMC to 130 % (60 % now lol). Combining it with the 140 % loan player and the regular gains during a week of official games, I should be able to close the gap a couple of percentage points.