You guys have a game mode that's "Fight a bunch of guys til you get to the end and kill a boss." You wouldn't have to do this weird drop you back in the hub with a box you can't open in the hub thing. Not to mention the "Challenges" catch-all menu is starting to get a bit bloated, especially with two difficulties for about half of the items there.
I mean, I guess it's a bit short for a terminal or one-shot (especially a one-shot) but I'm sure you could've come up with a bit more content for it that worked. This just seems like a really bizarre choice to make it a two-difficulty "challenge" instead of just making it a new one-shot.