My apolgies for misunderstanding.
There are nearly 50 metres between facades along Overlea, and that wide space along the north side seems just begging for a right of way.
Had they stuck to keep the line along the northside of Overlea and running it straight to Don Mills (elevated), aesthetic issues aside, it would have reduced the tree cutting by at least 1/2, and it would have allowed for a very sensible station at Don Mills/Overlea which would have served one of the largest middle schools in the province and a high school, along with the southern 1/2 of Flemingdon Park.
Of course, that choice likely would have required demolishing the middle school to make it work which have added back at least 50M to the project cost.
It's not going to be pretty, but it's saving money and vegetation ultimately grows back.
Some vegetation will grow back, though it will take 30+ years to replicate what was there; but there is a structural net loss under the guideway and within about 10M adjacent, which does represent a material, sustained loss.