I have a slightly different experience to you. 30 minute commute each way but on mainly unclassified narrow windy country roads. Only manage 45 mpg and that's according to the trip computer so how accurate that is I don't know. And I have had dpf problems which again is probably down to the type of roads I use. To be honest I probably shouldn't have a diesel but 4 years ago I needed a car quickly, the 1.6 was sat in the showroom and was the most fun to drive out of everything else I tested that weekend
The engine does like motorway miles though as any time I head south I can get well over 55-60 mpg
However I'll happily sacrifice the economy for a commute that leaves me smiling most mornings