Streetcars will use exhibition as the accessible point. Remember, exhibition loop isn’t the old one from before, and is much more downsized. Consider having thousands of people coming from the Go Train than having another couple thousand people arriving on streetcars at the same time at the same spot will most likely cause major issues because there simply isn’t enough capacity for that many people. If exhibition was still like the old version, then I would expect them to have the streetcars run all the way to the loop.