As someone who helps run an insanely large campaign (over 100 players, 6000+ journal entries, 4000+ maps) we already have to break apart a lot of things in our campaign so that it will actually function on R20 at all. Being able to easily copy over a folder of journals with the transmog system would be extremely useful, to the point where I would likely immediately upgrade to pro. It should also, ideally, come with some way to select folders when trying to transmog. Having to look through thousands of journals (even alphabetized) is really annoying. Our short term fix is to have players put an * in front of their name when they are to be transferred to another campaign (which we use several linked together due to roll20 limitations on maps), but it would be nice to be able to not have to jerry-rig a system for it.