Hey @powerball253,
If you check our Process for reviewing classic confinement snaps, access to arbitrary files on the system is not typically a justification to grant classic confinement.
Also, there are standard locations for game related files and also for the libraries you are mentioning so you should be able to plug some interfaces like home, personal-files and even system-files if needed and keep EternalModManager under strict confinement.
Could you please try and let us know?
Thanks!