I would not be too worried about the Eglinton East operations though. The demand from those 60+ residential highrises will be very easily handled by the at-grade LRT. The subway-level demand never comes from any kind of local residential density; such demand is always generated by the feeder routes. Downtown is the only area of the city that can fill the subways with walk-in traffic, and even that is due to the very high employment density, not residential density.
Eglinton East is not a trunk route and will have very few feeders, therefore it will not surpass the light-rail capacity.
No contest that the overall Crosstown design will look odd, being a messy blend of competing design concepts. The original concept of tunneling the central section only and doing the rest at grade, certainly was sensible for keeping the cost down. But if we are tunneling the whole west side anyway, and the total cost will be >80% of the cost of a fully grade-separate line, then it would make more sense to build the whole line as grade-separated.
Furthermore, the designers of the original ECLRT put the Don Mills Stn underground to strengthen the eastern section and improve the connection to DRL, but then the actual OL/DRL station shifted to elevated resulting in a very long transfer. If the ECLRT planners knew that OL is going to be elevated at Eglinton, they would probably keep the ECLRT's Don Mills station at grade.
But despite all those oddities, the Crosstown will operate just fine. The eastern section will be a bit slower than it could be, but will not become overloaded. And in the west, should the demand exceed the expectations, the second branch serving the west and short-turning at Laird can be added. Laird is a dumb location for short-turn, the short-turning trains will be nearly empty between Yonge and Laird, but operationally this is not a big problem.