The most important part of a frequent release cycle is to hear what's working and what needs to be improved, so your feedback is extremely valued. For Windows Server, use your registered Windows 10 Insider device and use the Feedback Hub application. In the app, choose the Windows Server category and then the appropriate subcategory for your feedback. In the title of the Feedback, please indicate the build number you are providing feedback on ias shown below:
There is an issue where the App Compatibility FOD cannot be added to the OS .wim image offline using DISM /image method. After upgrade, it is necessary to reinstall the new FOD using DISM /online method.