Hi Cliff,
Last year, we exported the data to a single spreadsheet and added the graphs and charts. Then, whenever anyone opened that spreadsheet, they were able to synchronize the data and have all pivots and graphs update automatically.
Adding the charts and updating the data manually is not feasible as the form will be getting thousands of submissions a month and the parsed out data needs to be viewed by people who are not very tech-savvy.
I found on the MS Tech Forum that the excel/forms syncing tool has been eliminated. I've tried experimenting in OneDrive with the "Use Forms for Excel" tool, which syncs the data automatically but makes adding in charts/pivots an incredible burden as it has to be done in Excel Online. At this point, I think I'm just going to buy a Survey Monkey subscription and move over to that.