Vetex may have said magic changing will be done by an item other than interchange, but I feel like for something like this suggestion, interchange letting you swap magics would be a good placeholder until Vetex gets around to adding the magic swapping item(s).
It’s a relatively simple change, given how we already have an ingame magic changing menu via mage awakening, so just slapping that onto interchange as a pop up seems fine to me until whatever vetex has planned is added.
I think features that encourage creating multiple files are good because people who spend thousand of hours and hoard all items into a single file make the game rather unwelcoming to new and casual players, since these hoarders pretty much always end up becoming gankers sooner or later when they don’t have anything else to grind for.
