It would be great to have one place, where all of the rooms and traps and their respective levels would be listed, along with an option of starting an upgrade through the same place.
Why do I think it would be helpful?
While it is cool to see all of the stuff on the dungeon screen, with several dozen traps all over the map it makes it challenging sometimes to find which ones (not necessarily rooms, but traps) still need upgrading.
What do you think?
PS. Of course, I understand, that with the upgrades being so time-consuming, the only pastime that remains is fingering your traps one by one during those long days while waiting for another client to be released.