I don't think one would. I noted that if I came off the east side (northbound) I exit at Dundas Square instead of the Toronto Life building. Toronto Life (or whatever they call it now) is on the NE corner. Dundas Square is on the SE corner.
The worst stairs for crowding is the NW corner - but going to direct outside, it's still favourable over trying to go out into the Eaton Centre ... so if heading southbound to the 505, I'd use the stairs, and walk across the street. (though it's not a direction I usually transfer ... but I have done that to get to the sausage stand on the south side from a southbound train!).