The current PSE project as it’s stand shouldn’t be build, it will take away valuable transit funds for a project that don’t make sense and have a TONS of problems, so personnally I would scrap everything and wait for a window of opportunity that make possible to build something similar as the REM de l’Est. I would only twicked the design to make 80 meters station, extending with an elevated alignment to Rivière-des-Prairies on Maurice-Duplessis and add a connection to the Mascouche line at the Saint-Léonard-Montreal-North station.