When you find a better name for a page, write about why that is a better name, make the page, then drag the important stuff from the old to the new.
Example
In a flurry of activity Keith's bio page was incorrectly titled Keith Hampson. How embarrassing.
Keith filled out that page and noted his correct name.
I threw brackets around his name to make it a link then clicked it to make the correct page.
I then dragged his bio to the correct page.
This leaves a trail of mistakes, for sure. But it means that others, including Keith, can understand what happened and catch up. Just to make this whole process clear I'm documenting it as one of many Workflows.