That might've been me. I know I said that recently.
The C-Train is still a very good and successful light rail rapid transit system and it does hit places of interest a lot better than American LRT systems often do. But it does feel like they built it as quickly as possible to funnel as many white collar workers into the CBD and everything else was secondary or tertiary. Even downtown, 7th Ave is annoying to traverse because the trains don't get full signal priority (this is what I fear for the Valley Line) and it significantly slows down traffic. But beyond the core, there's a few other things about the routing choices in Calgary that aren't great:
1) Chinook Station and Chinook Mall. The station is a full 4 blocks from the entrance to the mall (1 block is crossing the parking lot). It doesn't stop the mall from getting a lot of patrons via transit, but it's definitely annoying, only fixed slightly by the new pedestrian bridge across MacLeod. I get why they did it - like the NE Capital Line ROW here, they were using an existing freight ROW, but it does feel silly. And something they'll probably never change, even though re-aligning down the middle of MacLeod (maybe elevated) from 39 Ave to Heritage makes most sense to get people where they want to go. As much as we complain about the configurations of Southgate and Kingsway stations, they are a breeze in comparison.
2) Everything around the UofC. This is where the "get people directly from the burbs to downtown" really comes into play. They punched as straight of a line as possible down Crowchild and from that perspective, it's efficient. But it means that at the UofC, the station skirts the easternmost edge of campus, rather than the UofA, where there's a station in the heart of campus plus a second one at the southern end of the main campus. Our main university is far better connected by light rail. There's a lot of other major destinations that should be big trip generators adjacent to the UofC too -- Market Mall, Foothills Hospital, Alberta Children's Hospital, and now the University District. All of these are to the west, further from Crowchild, and completely missed by the C-Train as a result. The closest analogy I can think of in Edmonton (but it isn't really the same) is the area around RAH, Kingsway, and NAIT - all big destinations, all properly accessible by light rail, even if in some cases (like Kingsway Mall) not the most perfect.
3) The west LRT basically goes nowhere of note besides Sunalta and Westbrook. Obviously beneficial to those living around there in SFHs to get downtown for work, but again, not much else. There could've instead been a line down Crowchild to connect MRU, Marda Loop, and other denser neighbourhoods with more infill opportunity than any of the ones on the current alignment aside from where Westbrook Mall is. I know this issue is somewhat fixed by the new MAX BRT but still. Whereas in Edmonton all 3 major post-secondary institutions are connected to the rail system.
There's other things it does well, and the Green Line will fill in some important gaps, but there's some major oversights that you don't see the likes of in Edmonton.