Here's an Idea for the Clipboard problem in Excel 2016
Post on Microsoft Community Answers - "When Excel shows this dialog after a copy (CTRL+C) action, it means that another app has a lock on the system clipboard. In this situation you can still paste within Excel. However you cannot paste to another app like Word or Outlook which uses the clipboard.
Last year we made some improvements to Office365 users so that this error message only shows once per Excel instance. This is based on customer feedback - the design change prevents it popping up multiple successive times when the clipboard is locked. We have also considered never showing the error dialog, but there was user feedback that this message is informative and helpful in some cases."
Why not develop the ability for multiple instances of the clipboard to work with a copy/paste command from each app? When several apps are open at the same time, give each it's own clipboard instance to keep the data "clean". After the command is executed, when the app closes, clear it's clipboard and close its clipboard.