I campaigned for Finch to be grade-separated, mostly elevated.
I figured that Eglinton LRT would be fully grade-separated (mostly elevated from Don River West Branch to Kennedy) and then connected to the SRT. It would be upgraded to new Mark III technology.
No point having Finch as an orphan LRT technology, so it too would be SkyTrain - but somewhat short trains than Eglinton-Scarborough. Finch would have 2 cars x 150 passengers per car x 20 trains per hour = 6k ppdph, while Eglinton would have 4 cars x 150 passengers x 24 trains per hour = 14k ppdph. This is a 33m platform vs. a 66m one. If needed, both could have 30 trains per hour (i.e. every 2 minutes), so Finch's capacity could be increased by 50%, and Eglintons by 25%.
Like my thoughts on other lines, the busiest stations would have Spanish solution (to reduce the dwell time on the busiest interchange stations), and these stations would also be built to accommodate 1 extra car per train. The trains would be longer than above (1 car longer for Finch, for 3, & 2 cars longer for Eglinton for 6). The typical station would be regular length (2 car or 4 car) to reduce costs (when underground) and to reduce visual intrusion (when elevated). The way it works is that 1 car typically doesn't line up with the station and it's doors don't open. Basically, for stations East of Yonge, the first car doesn't open, while for West of Yonge its the last car that doesn't open. This would add 50% to the above 2 capacities.
So overall, the ultimate capacities would be 13.5k and 27k.
As soon as Wynne got her majority in 2014, construction had progressed too far on Eglinton through Leslie and Don Mills, that it was too late to grade-separate this portion of Eglinton - or too costly and time consuming to rip up the existing contract and start this portion again. Same thing happened to Finch about a month (or less) before the election. The contract was signed and it just became cost prohibitive to rip it up and re-design the line.
For Eglinton West, it is still an open slate. Officially, the City has yet to decide whether this should be grade-separated or on-street. Both options (and a few others) are still in the discussions at the information sessions - so it is easy to just dictate that the grade-separated option will win.