Vancouver adjacent, but there's some relevant news on the upcoming AC 737 MAX 8 rouge refit
https://paxex.aero/air-canada-rouge-737max-configuration/
Apparently the new "Rouge" planes will continue to have the same seats in economy, WITH RECLINE (a likely one up to WestJet's decision to remove it), and the seats will even retain the existing seatback TVs and internet access. The main change to layout is 2 premium seats being swapped out for 4 more economy seats.
I suppose we can speculate on some reduction to the seat pitch and pricing/onboard service model to match the "Rouge" branding, but I feel this is better than we bargained for in terms of becoming a primarily Rouge base!