SCCM TP 1908 is out now and another cool feature that is worth noting is the ability to choose an image index when importing an operating system upgrade package.
To avail of the new ability open the Operating Systems node and expand Operating System Upgrade Packages, right click and choose Add Operating System Upgrade Package.
Select an operating system and in the window that appears, notice there’s an ability to select the image index by placing a check in the Extract a specific image index from install.wim of selected upgrade package box. Next, click the Image index: drop down menu and select the image index you wish to deploy. You may also want to specify the Architecture and Language settings below that.