I think I'm one of the only people here who actively book so I can be on the 67I 3-class 767-300ER. I absolutely adore the premium cabins, and the Economy seats are probably the most comfortable in the fleet, owing to their age. The bins are small, but I don't care.
The company was having a lot of trouble with the 767 fleet in summer of 2014, was better for 2015, so I hope we don't see a repeat again this year. I too was stuck twice in Geneva on these aircraft. It's undecided if the summer of 2014 was due to labor action, maintience, or both.