I like the prices where they are. I don't like that they are likely high to instigate microtransactions, but I do like that it ends up making the outfits (especially Mythic) a bit exclusive. And yes, I'd rather spend 7-15K on a badass outfit for one of my two mains than buy a new hero.
You can earn at least 7K a week easily if you do all of the Daily Orders and some/most of the Contract Orders.
it's not likely, that is the EXACT reason the price point is high. There was one point during a Den stream I believe where one of the guys said, " You're not meant to unlock everything in the game.." in response to the grind and it taking some absurd amount of years to unlock all things in game without ever buying steel.