I think that they left that to say that the price will decrease till the epic brawler's one

I think they kept that so they can keep track on how much each chromatic costs. I'm just assuming that's the case though because Sam and buster are considered mythics, Mandy is a legendary, and literally everyone else is an epic

Its still chromatic, it does go down in price over time

It says nothing about boxes, all it says is „chromatics decrease in rarity over time“

Anyone else notice Brawl Stars hasn’t removed this little chromatic tag yet even though boxes are gone?