Here are a few specific concerns I've come up with:
Putting the south-central hub at Heritage station rather than Chinook. I know it's easier for CT, and it may reduce travel times slightly -- although Google maps suggests otherwise -- but the clear urban node in south-central Calgary is Chinook. The Heritage
TOD plan has 435K sq. ft. of space. The
Chinook plan supports 7,900K sq. ft. of space -- and that's not including the mall (the largest retail node in Calgary) which has 1300K sq ft and is talking about adding another 1000K. It makes no sense to put the major east-west connection in the south one stop away from the largest node in the area. (For comparison, a built out Chinook TOD + expanded mall would have twice the floorspace of the airport, Mount Royal University and South Health Campus... combined.)
No east-west connections in the northwest. The radial lines shown go 10-14 km out from downtown, but the only major connection between them is 16th Ave, which is 2-4 km from downtown. And the 16th Ave connector isn't much; just a limited-stop bus. The same is true in the far south.
SW BRT does not connect to 52nd St E BRT. Surely some of the jobs in the SE industrial area are held by people from west of the Deerfoot, yet there is no connection made here.
8th Ave Subway deprioritized. I've played devil's advocate on this one, but this is one of the most important projects in terms of maintaining capacity. I think a big master plan like this one needs to shuffle the less sexy projects forward on the timeline, because nobody will care about this plan in 30 years when it's time to build the thing -- just like we don't care about the studies from the 80s. There will always be a constituency for expanding to another suburban lobe or adding a good crosstown service, but the 8th Ave subway doesn't have that constituency -- putting it in with all of the other lines will build that support, but once the other services get built, this support will evaporate. It needs to get built soon.
Phasing/design of NCLRT. The plan shows a "transitway to 78th Ave". That means surface running transit has been chosen -- the point of a transitway as precursor to LRT is that it's easy to change over, and we don't have the electric buses you would need for tunnel operations. Very subtle way of determining the technology before even determining the corridor.