I guess there's not much interest in datamining for this game since I haven't seen anyone post anything, even when Mita was in the beta files. Bit weird since it's Unity and a lot is unencrypted.

There's nothing super interesting but here's a couple things:
Chapter 3 is in Akihabara. If you're unaware, the third city is supposed to be out "shortly after release," with the planned schedule being a city every 3 months afterwards.
Possibly has 5 playable characters based on the profile badges (the 3 in the OP are on some tension cards already)
There's a chunk of art assets for Minato vs Chiyoda, might happen in-game as a way to recap the anime.
Arisugawa's tension card is the only one that has different art for the party menu slots. It was like that in the beta assets, too.
A lot of character icons got scrubbed for the full release, the 5 here being some of them.
There are a lot of totally wild and baseless assumptions you could make based on internal character IDs.