Without insider knowledge (which I don't have), she is making the assumption that ONTC is going to buy new trainsets, which I'm not sure has been established. They have announced the purchase of more power, but they could just as easily refurbish some more of their former GO fleet. The former would likely take less time but more money; the latter the opposite.
Buildings in Gravenhurst and Huntsville still exist. Huntsville is in private hands while G'Hurst is owned by the town. No doubt both would support a return to a 'train station', but leases need negotiating, tenants possibly relocated (apparently part of G'Hurst houses a vet clinic). Bracebridge was never more that a kiosk and I haven't noticed if it is still there.
I can understand the anticipation, but such things don't turn on a dime, and we have to remember that much of this is pre-election promises. I'm not sure how much money has actually changed hands.
I'm not sure I agree with her assertion that the Northlander was dropped because it interfered with freight operations. North of Washago, I believe there are two freight trains/day, and south of Washago, it didn't necessarily interfere as much as CN really didn't see it as a priority, a situation that will still exist. I foresee more interference with enhanced GO service on the Bala sub. in the GTA.
Advocacy is great, but when they start fussing over scheduling that works for multiple needs, and how people get from home to the train station (which, if anything, is a municipal issue), they really need to take a small pill.