Yes, I'm also thinking there will be a switch after Surrey Central now. It couldn't be before, cause all the traffic is at Surrey Central. Just run down a road, connect up with 104th, and you're good to go.
Btw, the new route Kevin has proposed is 10k, not 6k.
How about this proposal?
Basically, you're Expo line goes down to Newton and beyond. Most of the traffic of North Surrey is going to either Vancouver or Coquitlam anyways. Then the branch that goes off to Guildford, and eventually to Langley, why not have that as a new line? It would connect back up with Surrey Central, then split off after the SkyBridge and follow the Millennium Line, then hook into the Evergreen Line! If the Expo Line can share it's route with one more line, then it's completely feasible, considering none of the routes would have more than two lines going down it. Also facilitate much faster connections from Surrey and Langley to Coquitlam.
I know it's kinda of duplicating that Highway 1 Rapid Bus though...
Also if there's going to be a switch at Surrey Central, you can't overload the Expo Line with three different routes! Won't someone please think of the headways!