Holy Crappaloni! That does indeed sound like a disaster in waiting.
Think about every transborder connection. Arrive in T-new, transfer to T-2, clear USINS, bus to the satellite terminal, arrrrgghhhh! Doesn't matter if your arriving from overseas or Vancouver, you're in for a pretty exciting airport experience.
I wonder if they wouldn't be better off just swapping T-New for all of T-3 (or in the words of Aladdin {as played by Robin Williams} one from column A and all of column B.