1) I really appreciate your concept here! I, too, thought of the "using bodies" mechanic, figured there would be a ton of those, and decided to do something funny instead.
2) I watched your devlog. I've also recently done an audio narrative-based game for a jam, so I KNOW what a pain the recording can be! For my narrative game I broke down each line of dialogue into a short sentence, copied each line to a unique row in a spreadsheet, recorded each line in a separate file, and named the recording with the line of dialogue + a "key" that was listed in the spreadsheet + a version number. This allowed me to track re-recorded lines and keep things organized. In my case, I also recorded each line with several different emotions and character variations (happy, angry, scared, annoyed, arrogant, concerned, etc...). This helped me define the character and find the emotional arc of the narration.