I looked into this and Absolver is the only(?) weapon in which the firing sound deepens as power goes up. This quirk was lost when I reworked the frequencies in v.138.5.
Fixed in v.138.7 
Bug
Can’t replicate. I see the feathers and the darkening correctly.
Yes
You mean the CI5 galaxy map screen? I don’t think there are any numbers displayed there.
You cannot mix different versions for the .exe and the data files. Extract the latest version again, making sure to include all files.
I’ll see what I can do.
Fixed in v.138.7 Bug
Changed in v.138.7 Idea
Fixed in v.138.7 Bug
I thought I missed something, but I couldn’t figure out what.
Fixed in v.138.7 Bug
Changed in v.138.7 Idea
Because you’ve already forgotten immediately after starting the mission? 
Pause the game, it says at the bottom.
I’d rather not. They’re highly idiomatic and untranslatable. Plus, as you said, not every music track has a name.