It seems a common step when using Cinematic Mode for setting up a simple point and click interactive interface selection configuration is to turn on Cinematic Mode and enable the mouse for picking, it would seem, rather than adding a separate node to show and hide the mouse cursor, it would be nice if the Cinematic Mode Node had a Show Mouse Cursor checkbox added to it for this underneath the Affects Hud checkbox.
I was looking over your post and I thought that this request sounded reasonable. I have written up a report ( UE-15918) and I have submitted it to the developers for further consideration. Thank you for your time and information.
Make it a great day