I think it'd be convenient if we got an item that allow us to see what's in our PC at any location and the summaries of the Pokemon inside, but not being able to rearrange or change party; it is simply just a preview to check up on IV's and movesets and whatnot.
It'd be nice to have this if I'm breeding pokemon and need to figure out what IV's I still need to catch instead of going to a pokecenter.