I made a plan:
Dark blue = my plan
Light blue = room for expansion
Dark green = current plan
Light green = possible expansion of current plan
My plan is only half a km longer and the room for expansion is about is about 0.7 km longer, but with potential for much, much more than the current plan involves.
Please take a look and let me know what you think. I've lived in this neighbourhood (around Guildford and went to all three schools on it) for my entire life and think that I can offer some perspective.
I placed markers for ideal station locations too.
Problems with the current plan: it is heading in the wrong direction; rapid transit will never expand up Westwood Plateau or David St. They should focus on expansion to downtown Port Coqtuitlam at Shaughnessy instead. By placing a station at Douglas College, it is much too far from the new collection of highrises growing between city hall and the mall. The original plan also misses the Newport area by a block. Barnet in that strip is: a restaurant, destination retail (ex: paint), light industrial/warehousing, couple little ground floor offices/car places, and fast food joints.
Then again there's the argument that such a line would develop and improve Barnet. Guildford is all built out quite nicely, not a lot of room for improvement.