Wow, I can't believe the opposition to this. I think the merging of everything that now makes up "Metro Vancouver" would be great. The duplication in municipal services like garbage pickup, parks board, road/utility maintenance, transit, and especially policing could be eliminated.
Hopefully the city would have a more combined, focused voice when approaching the provincial or federal government for tax changes, spending, etc.
Regarding cons, this is simply an organizational change. New West as a community won't go anywhere. Certainly we still have Gastown, Kits, even Whalley as distinct communities that aren't going anywhere. (Even if we wish they did in the case of Whalley.
Representation would be by population. Cities like Surrey would get a bigger say in the area, as they want (and deserve). And other cities like Burnaby and Port Moody wouldn't be throwing such a wrench into the plans of the region as a whole, just because of their geographic location.