I am quite happy with my rosters for the last few months on the Airbus. I get 4 good layovers a month on average with a few turns and seem to fly 75-80 hours BLOCK. The last 8 years I have been flying ULR so I am quite happy to have a year or two off from it and pass the baton to the 777.One fleet always seems to have the rough flying a few years ago it was the boeing and now it is meant to be the bus although I don't mind it at all. If you are so worried about duty time spend 10 minutes working it out for yourself.
The trainers get paid training pay for the extra work they have to do so it is only right that they get more duty hours.