While it's possible to shorten the SADB branch to save the cost, I doubt it's enough to make the east branch to PAT. Unless they cut the whole branch, otherwise it must go at least to Fairview so the saving is not enough. As CAQ brands itself as a business friendly, PLQ alternative party, I don't think they would cut the whole west branch. I personally would prefer they stop at Fairview and use the saving money to improve the road/bus network around (ie, open Jacques Bizard corridor, more buses to Fairview terminal) and extend orange line to Bois Franc.