The MKZ was one of 22 vehicles that won the IIHS's Top Safety Pick+ Award this year.
IIHS is using new criteria for the awards this year. TOP SAFETY PICK requires good performance in the Institute's moderate overlap front, side, roof strength and head restraint tests and, for the first time, good or acceptable performance in the small overlap front test introduced in 2012. The same level of performance in those tests, along with at least a basic rating for front crash prevention, is required for the higher accolade, TOP SAFETY PICK+.
So I would say that this is great news. You can say plenty of things about the MKZ, but you can't say that it is unsafe.