The more troubling thing about Translink is their apparent inability to execute even the simplest of projects. Remember the Compass cards? Still not in effect. Similarly, turnstiles in the skytrain still don't work, so many people don't pay.
Building new rail service and adding more bus routes seems orders of magnitude more complex than implementing a check in/check out card system or enabling turnstiles in the skytrain stations. If they fail to execute simple tasks at the cost of hundreds of millions, why would they be able to execute complex tasks at the cost of billions?
This in addition to the fact that sales taxes are the most regressive taxes you can have. Why not property tax? Only extremely wealthy people can afford property in Vancouver. Seems like a better place to start...
Like I said, I have no skin in this game. Just trying to shed some light on some of the more salient points from the No side.