The ability to adjust the amount of Zoom in your computer mouse is available in AutoCAD as a system variable called ZOOMFACTOR. Inventor has this ability as well, but it has to be done through the registry editor. This seems like a simple enough addition to make to the Application Options for users that work on small designs and the users that work on large designs.
Current Location of the Registry Edit to accomplish this....
Browse to HKEY_CURRENT_USER/SOFTWARE/Autodesk/Inventor/ResistryVersion21.0 (this is Inventor 2017)/System/Preferences/Display
In here you will find a registry key named Wheel Zoom Speed with a default value of 1. Modify this value to a lower setting to zoom less and a higher number to zoom more. I find a setting of .5 is rather tolerable if you are working on what most Inventor users work on (small or medium assemblies).