No harm in throwing ideas out.
How are these U-Turns being done?
Yes, you could send pedestrians up and over Eglinton, but CPKC's existing bridge would not be suitable and in any event they wouldn't share it, but that's not such a big deal, I'm not entirely convinced people would be cooperative though. You're going to have to put full height barriers, blocking not just cars but pedestrian movements, there is a question of 'emergency' egress.
Looking at the existing configuration you would have to extend the platforms slightly to the east, then run full-width stairs up and over, that, of course, means the stop would not be accessible, but there is no room for stairs and an elevator. (or more accurately, 3 elevators, one from each platform and one back to the north side of the street. There's no room for one on the south side due to the embankment.
There appears to be physical space that would allow this, especially if removing the existing traffic lights and any through (over the tracks) vehicle movements. But it would be tight for radii, would mean slip lanes for pedestrians to cross those ramps, and there would be probable traffic conflicts between on/off ramps that are very close together.
Let me show you:
View attachment 707327
Crude, but I measured the diameter of the ramp on the other side, it just fits. So that you can eliminate SB DVP to EB Eglinton at the lights.
However.....
When you extend the line to the on-ramp to DVP NB on the east side of the Parkway, there is a potential issue:
View attachment 707328
You've got roughly 140m of fast-moving traffic coming off the DVP that does not want to get back on; and that same distance within which everyone who wants to get on the DVP has to get into that lane and then immediately take the ramp.