Wouldn’t help, because any changes I make would be wiped out on the next update (plus it kind of defeats the purpose of an immutable system). I don’t want to go down that road, primarily because the maintenance needs to be as easy as clicking a button (I’m not the only user, so ease of use is necessary).
The better option would be to have it live in the filesystem overlay, but I can’t seem to get that to work. It’s possible that it could be a flatpak, as ProtonVPN has their client as a flatpak, but PIA doesn’t seem all that interested in throwing any bones to Linux users.