Hello, Peter,
I think this looks pretty good so far. It is just a first look at how that route would operate, but it gives a good explanation of how to deal with the more complex section between 14 St W and 6 St E.
I have a couple comments here: 16th Av was only widened between the east ramp at 14 St W, and 6 St E, and the design of the sections west of 14th and east of 6th will have to be handled differently. In particular, the section between 14th and Crowchild has a very narrow median, and very poor pedestrian access to 16th itself (I live there, so I get a first hand experience of this every day). As well, some sort of connection to Lions Park station would have to be thought up, and running the BRT along 14 Av like the 19 currently does would not work, because of turning off of 16th, and because there is no room at Lions Park for articulated buses or BRT stations.
Other than that, what's left is just station locations, and discussing any parts of the route that aren't between 19 St and 6 St. I would like to suggest that we think of a route past Foothills Children's and U of C as following the 91 to Brentwood and not a "loop" as described here.
I will have more to say about the route in general, since I am familiar with the area, but it doesn't apply to this particular post.
Matt Alcock