All in all, most of the changes are to aesthetics. They curved all of the straight cues. The head lamps are totally LED driven, including turn, fog, and high and low beam.
Dual clutch. Magnetic suspension. Direct injection, too. But I wouldn't expect too much gain because it would infringe on the GT350's territory. Ford needs an excuse to charge $20k more for an additional 90 horsepower.
I honestly would wait until 2020. I believe that is the next model change and I anticipate they will up the HP to keep up with the pissing contest. I think the S550 platform is mostly being used to experiment with IRS, magnetic suspension, and direct injection capabilities on mass production scale (reliability and capability).