That's what I've been thinking. Her ego is too large to destroy the legacy of her brilliance. She just wants the e-mails gone while she runs for president and while she is president.
Remember, in her mind she is the smartest woman who ever lived, and the best SOS we have ever had. She wants that story to be written and preserved for all time.
No, the private server was set up for just that purpose, so she could control the contents and keep it from the vast right wing conspiracy. She did not delete the e-mails and will not delete them. However, you can bet the server is no longer in the same place.