Technically all of this is true, but in the grand scheme of things, compared to the other work that's going into GO Expansion, all of this is fairly small. The biggest issues with GO at the moment aren't the trip times or the pollution, its the very infrequent service and the lack of fare integration within the city of Toronto, which the current works solves the former. If we were to do a head to head comparison of a theoretical GO Expansion without electrification, and a GO Electrified, and compare them to status quo GO, the former is far more useful and important. Even without electrification, we are able to achieve 15 minute+ headways on many of the routes with a theoretical maximum of 5 minutes, with improved stations that have full platform canopies and grade separations that reduces noise and doesn't obstruct regular traffic as much. Meanwhile a "GO Electrified" would still leave most routes stuck at hourly service with the only benefit compared to status quo being, what, slightly faster trip times and less pollution? Of course I'm not here to undermine the importance electrification, faster travel times will allow us to be more liberal with building infill stations that serve more areas of the city allowing these lines to more resemble overground subway lines however at the end of the day if we ask ourselves what the most important aspects of GO Expansion are, those are the double tracking, grade separations, and station expansion projects that we are currently building right now. Stuff like electrification is just the cherry on top of the sundae.