IMO LRT makes way more sense than commuter LRT has so much better connectivity - I'd venture as many Okotokers have destinations in southern Calgary as in DT, and the red line connects better to DT anyways. Any time saved by a faster run to downtown Grand Central Station is lost getting on to your actual destination.
Maybe once there's a train to Lethbridge it makes more sense, but even then I'm not sure that should stop at Okotoks every time. That also prompts an interesting question - where should south line regional stops be within Calgary? I'd say either Chinook or Heritage (Heritage probably more likely based on available space and connections) and and one or both of Anderson/Somerset.