This is classic Google behavior and is disrespectful to your corporate IT customers; I really hope it is not a new MS trend. I'm just going to say it; it feels like you are deliberately trying to impede our ability to manage our own users. That's bizarre for what is usually a Microsoft strength. I have to agree with most of the feedback. I'm not opposed the personal use concept at all, but this is a poorly thought-out way to implement this. I manage hundreds of end users, and you are drastically overestimating the average end users' ability, many don't even know the difference between Windows and MS Word. Half of the time we spend curating the user experience is for usability to prevent help desk calls rather than security related.
The fact that it is not well integrated with GPO yet is both telling and astonishing. You introduced a feature specifically for the corporate environment but did not build in strong integration with you own corporate managed policy tool. You enable it automatically with little warning. And apparently did not garner significant input from any actual corporate IT users.
This is a reasonable feature that really needs to be reimagined to more appropriately meet the needs of its audience.