This is how we secure Workspace here at Fleet. We figured the guide could be useful to companies of a similar size. The next step would be to enable Endpoint Verification to control access to specific apps such as Drive so it could only be done from up to date, encrypted devices, but that requires a the highest Google subscription.
We also reached out to sales and got a deal, explaining we didn't want to pay prices designed for companies with 1000s of employees.