I've lived here all my life and am convinced that he's wrong. Reusing hydro and rail corridors was key to keeping phase 1 affordable enough to actually happen. Hate on the route all you want, but any other routing would have cost significantly more and failed to pass the many so-called 'transit referendum' elections that it got through.
My only regret with the phase 1 route was that they couldn't keep it in the rail corridor between Hayward and the hydro corridor, ducking under Block Line and crossing Courtland with straight track at higher speeds, with an Ottawa/Pimisi style station at Block Line. The current route absolutely crawls along beside Courtland between Block Line and Hayward, then tip toes its way through the Hayward s-bends. Rumour has it that CN/CP blocked any use of the space alongside their interchange yard though, so it was simply not to be.