It is already getting reworked at the moment due to a lot of persistent bugs with how the game saves the game state.
We didn't have plans yet to change the UX of it, but you bring up a good point that you don't see any differences in the state of a save file aside from the date and the thumbnail.
Given just how many characters you can progress with at the same time, it's a little bit of a conundrum how to convey relevant information.
We will be brainstorming about this, but I wouldn't expect a change in the UX to come out soon.
At the moment I am focusing on improving forward compatibility of save files.
Baku