Update, it now seems like Laura's only dropping Witten. Saviano's apparently still head coach. I guess Laura's decided to get an actual coach rather than relying on the input of a fifth rung ATPer and a guy hundreds/thousands of miles away. Saviano's still got a lot of experience and can help Hadad get more out of Laura than he can on his own (two heads are better than one).
It's an improvement. How long will it sat though?
Side note, seems like Saviano's has the best gig in Tennis. Paid by more than one team to not directly coach players, not travel, can put most of his effort/attention into his academy but while still getting the credit as 'head coach?' Dude's got it figured out, and/or is an evil genius.