Well I mean we are all cramming it in there. IF the OL had stuck to the DRL route, no one would complain. This is MX's idea to go through the Lakeshore east train route. This is the result.
The old DRL route was better, no doubt. It would allow for larger DRL trains, as well as leave valuable space in the Lakeshore East corridor for more GO trains.
That said - if we are talking specifically about the noise complains of the Leslieville residents, it is fair to say that they can achieve a better overall outcome by asking for the GO trains upgrade from diesel to electric or to bi-mode, than by tweaking the subway route.