You know, I've heard no opposition to this at all. These are the historic boundaries for this riding. In fact, some of the local MLAs have suggested to me that this should be together, because there is a lot of working together in Calgary, and this seems like a very disruptive change that really just didn't have any representation when it was being made.
Evidence of meeting #59 for Procedure and House Affairs in the 41st Parliament, 1st session. (The original version is on Parliament’s site, as are the minutes.) The winning word was lethbridge.
A recording is available from Parliament.