I fooled around in Ginza today and had a fun battle with a domain boss. I also advanced the main story, and was very pleased with the presentation of the entire Ginza quest. Finally, I found (well, fused) my first demon with the Null Physical skill, so I anticipate a very large number of fusions in my next play session.
Meanwhile, on the app side of things, I've decided to prioritize compendium price reductions over MP restoration. My MO to this point had been to pick strategically valuable upgrades (skill and stock expansions, skill augment, demolingual) over merely convenient ones, but given my likely schedule these next few weeks, if I have to run all over the map to re-recruit fusion fodder, I may not finish the game until September.