The Lakeshore West Corridor gets more trains, and some limited runs returned to West Harbour. Though I would also really like to see the 16 come back, at least on weekends and in the off-peak direction on weekdays to start, GO I guess still sees it as a duplication of service where there's still plenty of capacity.
Not the Cookstown Outlets on the 400, but the one at the 401 and Trafalgar Road, which dozens of GO buses pass by daily. It's in Halton Hills (barely), but it really should be served by Milton Transit, Brampton Transit, and/or Miway, to provide transit access for mall employees.