As far as I know there seems to be no current plan to replace the grossly inadequate, downstairs INS pre - clearance facility at the end of Pier B.
Now it seems odd to spend shedloads of money on a shed there and yet do nothing about this seriously underscale facility.
Under stress when one USA flight is outbound, hellish when two or more flights are waiting. As far as I can see there is no plan to resolve this problem, where passengers are funneled into a very small holding pen with few seats, toilets & beer facilities only.
A nice final tribute to outgoing visitors from the USA.