And GO is in the midst of being transformed into something that will have little resemblance to the current situation. The way GO acts as a Union centred commuter service today is irrelevant to how it will function in the future. A decade from now we'll look back in amusement at how GO used to be just a cute shuttle to one station.
The concerns that GO and TTC being merged will result in worse TTC service is an odd one. Our current system of flat fares rewards long trips in the suburbs and penalizes short trips downtown. It makes it easier to cut downtown service and prioritize suburban expansion. And sure enough, almost all the TTC expansion in the last generation or two has been in the suburbs, with next to nothing downtown. If anything, fare integration will mean demand and service increases in the central part of the city, whether the TTC and Metrolinx merge or not. If our fare integration works like anywhere else in the world, longer trips will cost more and shorter trips will cost less regardless of which vehicle you're on. At the same time, demand for long TTC trips on streets like Finch will decline because GO RER will take people where they're going for, presumably, the same price as a TTC trip.
We have to stop thinking of the TTC and GO as separate, competing silos. That's a point of view that's quickly becoming obsolete. It will be one integrated system in the future and there will be very little to distinguish a TTC trip from a GO trip.