Dear SdeHond,
Thank you for posting back. We appreciate your precious time doing tests.
Very glad to know the steps shared above can help you make the links update seamlessly. Thank you for sharing. 😊
And I recommend you send feedback for the Paste Special feature, you may go to File>Feedback within PowerPoint to provide feedback, this is the best way to let PowerPoint developers know your requirement and help us improve the product.
At the same time, if you find our reply helpful, you may use the feedback tool under our replies (as shown below) to provide your valuable feedback, which will also help other community members who have similar questions.
Welcome to post new threads when you have other questions, we are always here to assist you.
Hope you have a nice day, stay safe and healthy always!
Sincerely,
Tina | Microsoft Community Moderator