No one likes paying for something that used to be free, but really:
-Ridership on the LRT (Especially the North-South line) is really NOT a problem. It's not like the city is in a position where they need to encourage ridership of the LRT, which was the original purpose of Park'n'Ride lots.
-If people really hate the $3, maybe some will take the bus (essentially for free) to the LRT stations. If this happens, hopefully service improves as demand does. Less traffic, less road expansion necessary, it's an idealist hippies wet dream.
-Park'n'Ride lots are prime real estate. They are already looking at redeveloping the Brentwood area. If people indeed started resorting to taking the bus to LRT stations, and they are looking at moving, wouldn't an appartment or rowhouse sitting on the former parking lot at the LRT station be a pretty prime place to live? People eventually start moving closer to transit, the cities footprint stops exploding, we all hold hands and sing songs in a circle around our VW vans that we no longer need.
Honestly though, not really a bad vision if they improve feeder busses to LRT stations and go with more transit oriented development.
EDIT: Too slow