Sounds like an incentive to burn more DEC/VOUCHER for energy to get those extra battles! Of course win rate is important for the efficiency of earning ranked rewards, but it is now not the only important metric.

Although I understand that those who don't spend on the extra battles will get left behind a bit, now there is an incentive in place for people to actively purchase energy to get as high as they can. Provided that Modern remains bot-free (with honorable people not using battle helpers), then this is another positive change that encourages people to spend more to earn more. People with high win rates will still prosper in tournaments and brawls, but this ranked change is still a net positive for me regardless if people can spend more energy to win more battles.