IMO even if you switched the wards that Chu and Keating represented, you would still have the same result. The Green Line planners were always far more interested in going SE than N, and forced that way when they only looked for maintenance yards sites in the SE, picking Shepard which is almost as far from downtown as the Red Line terminus station at Somerset. And once the Green Line budget nearly doubled in costs, being forced to go 18 km south to reach the yard meant there was no money left to go north.
And while Chu was bad at advocating for LRT for Ward 4, that ward at least is pretty close to downtown and has frequent and high capacity bus service. It's Ward 3 (communities north of Beddington Trail) that really needs it and whose councillor was also absent.