I'm on the same page as you. On a strict basis of number of cars stopped/delayed by a train on a daily basis, 75th probably does beat out any other at-grade intersection in the city, but after the costs of this project I just don't see the value doing anymore unless it's part of an already large redevelopment of an area/intersection.
Not in Edmonton proper, but I do think the CN ROW on HWY 60 just north of 16A could be done someday (and I'm guessing it might be part of the final twinning of 60 between HWY 16 and Devon), especially since Acheson continues to expand and grow as a strong industrial sector in the metro region. Plus good lord CN runs a lot of trains down that track