Eglinton East would terminate at a station at Brimley/Eglinton, (Line 2), yes.
So the route would be eliminated west of Brimley.
This shortens the bus route, eliminates multiple traffic lights, and route congestion, resulting in shorter travel times for route users.
Aside from the EELRT itself (which again, is not the right solution}.
You need to think about a proposed subway extension along a corridor in the north end of the City and how its eastern terminus might be sited. (best I can do for now, LOL)