What would make a friendly interface in your opinion?

The sq frontend uses git style subcommands to clearly separate actions from options. This is something that gpg doesn't do too well. For instance, commands (e.g., -e) look like options (e.g., -r). If no command is given, gpg tries to guess what you meant, which is perhaps good for users, but bad for programmers. And if an option isn't relevant to a command, it is often just ignored, which again, is perhaps reasonable for users, but bad for programmers.