I wonder three things:

- Could this be used to run a benign mitm attack on the traffic of some apps, consoles etc? I could see some interesting uses for reverse engineering. For example you can't simply add a CA to the system store on Android anymore. But this one is already there. It won't work for long but it could be used on any unpatched client.

- Can't we just revoke the entire CA? Just like what was done with Diginotar. Edit: apparently they just revoked the intermediates.

- Why isn't there a mechanism where a domain owner can specify which CA it allows? Similar to SPF which allows you to specify which mail server can represent you. It's kinda insane that foreign CAs can just fake anyone's certificate.