Exhibition which already serves multiple streetcar routes, the very busy Dufferin bus, (soon the Ossington bus too), and which will have a four platform regional rail station doesn't align with the "it's just condos" statement - I don't get why you keep repeating that. Even today with meh GO service Exhibition is surprisingly busy.
An entire neighborhood the size of Cityplace might have 20,000 residents but a station like this can drive far more ridership - no reason LSW couldn't be moving 500,000+ riders per day post RER and only a fraction would need to switch at Ex to make it extremely busy.
The Crosstown was not a Metrolinx project from the top - so I am hesitant to blame all the issues on them. Clearly Mx has it's issues but, I think its hard to judge based on a lot of decisions that were locked in before they took Eglinton over.