I'm opposed to putting anything on the right click menu unless it is immediately helpful for the items that are selected. It is called a "context menu" which means a menu of actions that are specifically relevant to the item or items selected. Create SubVI is a very broad action that can apply to just about anything, and is not used often enough that it needs to be upgraded to a prominent position within the right-click context menu. When more and more items are moved to the right click menu, the importance and the convenience of the items that were already decreases as the right click menu becomes more cluttered.
In previous versions of LabVIEW, it was necessary add the following to the LabVIEW.ini file: inlineSubVIEnabled = TRUE, so that the developers have the opction "Inline SubVI" in shortcut menu. From the LV17 version, this option is activated by default, and we can find it in the contextual menu as "Reenplace SubVI with Content".
From my point of view, if LabVIEW has included this option, it could be understood that there is also the option to "Create SubVI" in the contextual menu.
Actually, I think there are some options that can be grouped