Why do I have to Force Quit finder to see my new screenshot files?
Try this I found on StackOverflow Automator Command to Refresh ALL Finder Windows
Make it into an applescript application.

btw, you don't need to force-quit the finder, you can relaunch it gracefully if you Opt/right click or Ctrl/Opt/left click on the icon in the dock.

tell application "Finder"
    set theWindows to every window
    repeat with i from 1 to number of items in theWindows
        set this_item to item i of theWindows
        set theView to current view of this_item
        if theView is list view then
            set current view of this_item to icon view
        else
            set current view of this_item to list view

        end if
        set current view of this_item to theView
    end repeat  
end tell