Accessibility information on packaging
Include similar information to the previously mentioned storefronts info on the back of packaging, in the same way as information on number of players supported, install space, microphone requirement, age rating and so on.
Space is obviously more of an issue on physical packaging than when distributing digitally, but even just information on a few key features such as remappable controls or subtitles could go a long way.
Existing packaging information on Killzone PS4
Next: Provide direct route for gamers to get in touch with developers