I tend to agree with DP. I have used Rouge premium eco many times, at best it's a bit ropey. Time keeping is poor, no IFE- only downloads. Never more than 6 in Prem eco whenever I've used. However, in 2016 mainline operated the service for about 2 weeks, whilst some Rouge 763s were on maintenance. The mainline AC 763 business class was full.
Like many, I've opted several times the AMS or LHR route rather than take the Rouge product. My destination is usually YUL so LHR/AMS can make sense. Nonetheless I think there is demand for a better premium Canadian service.