I have often wished to be able to simply exchange items with another hearthling in HnH. Right now this is done in person by putting things in a container, or dropping them on the floor. Even this does not work, though, in areas where one or both hearthlings don't have theft permissions (common in villages and community places in general, where people might especially want to be able to exchange with each other.) It would also be nice to be able to exchange one or two items on my own claim without giving blanket theft permissions for everything.
I don't know why this isn't part of HnH already? Is it redundant since the current way works well enough? Too safe? (Allow people to use theft on the items in the exchange window then?) Not high enough priority or important enough, given that the current system works well enough for people to get by?
An exchange window like this would also allow people to show each other objects without actually giving them to another person, and again without needing to use a container.