I own two Volvos and I can tell you that with the new insanely complicated engines no mechanic will touch the car. You will be stuck servicing it at Volvo dealership at lawyers hourly rates. And this will be aggravated by the fact that with more moving parts the car will break more often. Plus the cost of the new engine is much higher. The base price of the 2016 XC90 with the new engine is well above what the previous model cost. The fuel efficiency savings are unlikely to come close to offsetting the increased cost of ownership.
It seems that Volvo adopted the "differentiation" strategy of some hardware manufacturers - needlessly boosting the specs which looks good on paper but doesn't do squat for the end user.
In my opinion it's move in the wrong direction for Volvo that used be known for it's simplicity.