Interesting response. I have to disagree about there being any hope of restoring trust, though. In any contract, when one party clearly believes that they have the power to retroactively (and probably illegally) change the terms without communication or negotiation, only a fool would ever trust them again.
As an end user, after their admission of installing spyware alongside the engine, I'm not interested in having Unity on my machine in any way. At least not until someone works out how to block it phoning home.