Assuming the matchmaking is fair and we will have teams with the same percentage in ours groups at the start season, will something be done so that the teams do not abuse and get to be 15-20-50% stronger than the other teams?
This is exactly what everyone will do. It will be a percentage race.
If you don't want to pay, then you can't complain about not winning either. If you expect to win it all for free, you better have state of the art strategy