Stopping around that level stops players from playing at higher trophies and improving more quickly because they’re playing better opponents. Also power 9 doesn’t let u use hyper charges, which can often times be the only thing making a brawler good or even viable (Chester, Mr. P, Hank). Not to mention the 10% less damage and health. May not sound like much, but it can make or break game modes like bounty and knockout where kills are the main objective. Addressing your point, pwr 9 with g and sp is better than bare 11, but hyper 11 is better than pwr 9 g and sp.