TOH, much of the popularity of the current 777 with passengers is due to the relatively wide seating - which would obviously be lost with 10 abreast seating
Not that CX cares much about pax comfort.
If they prefer to risk losing their premium pax by sticking to the horrible first class and run-of-the-mill biz class of the T7 to seek immediate fuel savings, I doubt they have the slightest hesitation about skimping on the cattle-class dwellers...