I don't think that this is her last show. I believe that Riccardo will spend more time with her in the company to make the transition smooth.
But, with Versus & Versace that are both a bit messy, she needs to leave on a high note.
Yes, the business is doing well but she needs to get the creative part together!
Amber Valletta (Donatella's longtime muse) closed the show, and that's giving me vibes of when Georgina Grenville closed the Gucci F/W 2004 show, Tom's final one for Gucci...