This is a fantastic map gweed. I'm not trying to butter you up or anything but I must say I'm always looking forward to new posts from you because your maps are always pragmatic and top-notch. Your efforts are much appreciated.
One note however: the Lakeshore REX should ideally be extended to Clarkson. Perhaps it could even be extended to Oakville as there are long-term plans to completely redevelop the area surrounding Oakville GO into an integral transportation hub. Oakville is also the busiest GO station by passenger volume.
Hahaha, thank you! I enjoy making the maps, and trying out new things with them to see if they fit. Some do, some don't. The Queen tunnel is a new thing I decided to try out to see how it would look in a network. Given that Metrolinx is going to be spending $6B+ on the DRL, I figured it would be interesting to integrate that into GO REX instead of the TTC network.
And yeah, extending to Clarkson does make sense. Oakville I'm not a fan of, because I think the "overlap" service should be intended for the inner suburbs. Oakville is kind of on the bubble for that, but I think it's outside it.