Eventhough it would be a smart use of ressources, I highly doubt this will happen. Pretty much everywhere in North America,malls next to transit stops strictly prohibit use of their parking to riders. They often agressively tow cars, like at the Norgate mall next to Cote Vertu metro, Tyson Corner mall in DC, St Laurent mall in Ottawa, etc.
As you say these stations are in well established neighbourhoods, with an established ridership from the DM train era (parkings were at capacity pre-covid), although further from the 40 corridor, thus why I kept them apart.
Their role might become a bit more local as the main commuting corridor along the 40 will be served by the new branch.
This is concerning if true, and will clearly negatively impact ridership. Apart of “ideological” reasons, there is no rationale to have 3000 spots at Brossard station which is way closer to downtown, but only a few along the WI branch. It is such a low hanging fruit wheras the branch is litteraly in a highway corridor and mostly in an industrial area.
It is not normal that Bois Franc which is in a denser area in the middle of a major urban transfromation will have more surface parking than Anse or Sources.