I realize this would be costly and doesn't make sense in the near term, particularly in light of the construction just having finished.....but.
I would argue we really out to remove the embankment on which Queensway sits, wherever there are no buildings directly abutting it, and replace it with a viaduct/bridge structure.
This would allow any stop at Parkside to be accessed by completely open to the air stairs (glassed in if desired to minimize snow/ice in winter). The larger reason for doing this is that the section of Queensway south of Grenadier was more saturated and less stable than had been thought previously, making maintaining the Queensway there, at-grade, more challenging, providing proper bridge piers and letting the water underneath loose as open creeks and natural wetlands would be beneficial ecologically, and for flood control, providing excess water somewhere to go.
Its a hugely expensive idea for something that would not improve most people's day to day life...........and will have to wait for another time; but I still think its the right long term idea.
The maximal version of same would involve altering the Gardiner and the Rail Corridor in a similar fashion. (you wouldn't need to remove the entire embankment in those cases, but you would considering widen 3 of the current openings for roads)