They were not mind controlled by Darkseid, they were possessed by the Furies of Apokolips, and stupid looking clothes is what the Furies do best. For that matter, it is what Kirby characters do best.
Frankly, I'll never understand all the complaints about impractical clothes. Do people honestly want to see all superheroes fighting crime in sweat pants? Yes, it makes sense but it looks awful. Yes, a few heroes will die getting their cape stuck in a door or falling down trying to run with high heels, but it's small sacrifice to pay to avoid looking at people fighting crime in tennis shoes and sweat pants like they are buying crap at Walmart.
Also, by the time we see the Furies in Final Crisis, it's a few weeks after Final Crisis 3, so Darkseid's troops had more than enough time to find whatever girls he wanted from all around the world to form the new Furies. They didn't need to be at Bludhaven with Wondy.