This plan almost makes me think the GTAA would have been better off extensively rehabbing the T2 building and turning it into a pier or satellite for T1 (with groundside access, check in, security, baggage claim, CBSA etc moved to the new terminal). Unlike the old T1 Aeroquay, T2 wasn't hopelessly outdated - the basic floor plan and passenger flows were more or less modern, and most airports have facilities of T2's age in daily use, usually upgraded or incorporated into newer buildings. It would be less cramped than the old T2 because the whole building would be airside (and the current ground level gates at T1 are worse than T2 was).