The diet is coming in 2015 along with new front and rear facia's and new interiors. The "diet" is via different front and rear suspensions with the use of more aluminum and extensive chassis modification, technology that fiat is known for that will help lighten the car and as an added bonus will allow for the addition of the new 8 speed automatic transmission. The all new large car is still years away probably in 2017 or so. None of this information is just my speculation but readily available on the internet.