Odd that YYZ is so slow to respond to growth. Here, YVR, which is experiencing about the same growth rate, keeps planning ahead and is just about to embark on several terminal expansions, D and A piers, and well as tripling the size of the parkade and an eastward extension of the US Departures check-in building.
The thing is with YVR compared to YYZ, the growth rates may be the same, but YYZ has over double the passengers, YYZ adds over twice as many new pax per year as YVR does, around 4-5 million more pax per year in the case of YYZ. The time has passed for incremental upgrades, that ship has long since sailed. They need a radical new plan and fast before delays and holds become unmanageable. Ground level boarding on hardstands will help in the summer, and the winter has slightly less movements, so there is a little bit more slack there. That's right now, this year will likely be about 48 million pax. Next year we are looking at maybe 53 million, They have to go somewhere.
An idea I have would be to start building where pier H is slated to be, bypassing pier G to allow the regional pier to remain in place, and just make it a simple, straight rectangular extension, like the T1 domestic pier. It can be attached to the main part of the terminal using a temporary connection with moving walkways or something to keep people moving, and then still allow pier G to eventually be built when the time comes.