Thanks for your feedback. My team is actually working on a comprehensive guide for install options and which network optimization technologies can be used when. On your ask: You can employ Delivery Optimization for Office in combination with Connected Cache to reduce the load on your corp internet circuits. We save tremendous saving when the combination of the two technologies is leveraged. For completeness, we could also use Configuration Manager Client Peer Cache,  but this would only cache the setup.exe and configuration file included in the deployment package.

Thanks again for the feedback, I will add this to the blog post later.