I was there a few days ago, it's been massively renovated, but nowhere near the needs of Domestic commuter transborder traffic, a pier F is definitely needed to make the system work sustainably.Do we have any new timelines for future Pearson gateside expansions? I haven't heard anything from them in a while.
Also, they just need to get rid of T3 altogether, it's dated, inefficient and should be rebuilt as an expansion of the existing T1. The challenge of rebuilding it will be insanely difficult however.
Here are some really really bad screenshots from a video of the new Pier G, but they'll at least give you an idea of what the new space looks like.
When getting off my CRJ from O'Hare, I also saw a weird looking design feature of the gates but it was under construction, but couldn't get a photo of it because I had to go through immigration.