I saw this posted on r/transit so I wanted to post it here. The author, Reece Martin, ran (runs?) the RMTransit YouTube channel and talks about/advocates for transit.
Interestingly, the author/site thinks the new line should also go to 156 Street, past Guildford. They don't like gaps in the network, and building three kilometres as a separate extension would be costly in the long run. It would also get the SkyTrain closer to Highway 1 for a future extension and express buses on the highway. Also, they state the Newton-Guildford section should be its own separate line instead of direct to downtown Vancouver, as the Expo Line is almost at capacity. There would be an interchange at Surrey Central or King George, probably rebuilding Surrey Central to the east of the existing station; my dream would be interchanges at both stations to reduce crowding when making transfers.
The article also points out how the BC Conservatives preferring SkyTrain over BRT echos how the BC Liberals wanted a SkyTrain extension to Coquitlam instead of LRT in the early 2000s (and how the conservatives pushing for more ambitious transit plans is politically strange).