This is pretty close to my thoughts about Eglinton. First of all, its demand will strongly depend on other parts of the network. If there is enough reliable east-west and downtown-bound lines other than Eglinton, then demand on Eglinton will not exceed the LRT range. On the other hand, if almost nothing else is built, and a lot of riders transfer to Eglinton first in order to get to Yonge or Spadina subways, then demand on Eglinton can reach the subway range.
Secondly, if subway was selected for Eglinton, the risk that only the central section will get built would be greater. And then there would be much fewer transfers to Eglinton, negating the capacity benefit of a subway.
If HRT was originally selected for Eglinton and a commitment existed to make it a long subway, it would work. But now it is too later to reshuffle all plans. Some investments related to LRT choice are already made (larger tunnel diameters to accommodate pantographs), and if we reject LRT and select something else now, we will have unnecessarily large tunnels without the benefit of being able to run in street-median east and west of the tunneled section.
So, LRT it is, but some fine-tuning is still desirable (first of all, south side of the road in the Leslie area).