Uber Express Pool: cheaper rides, as long as you don't mind walking

Uber just discovered a new activity to integrate into its app: walking.
Yes, using your feet is an essential ingredient in Uber Express Pool, a new option users in select cities will begin seeing in the Uber app. Similar to  standard Pool, Express Pool combines up to three individual rides into one, but instead of forcing the car to zig-zag across blocks to make three separate pickups, the app asks riders to walk 1-2 blocks so the car can stay on a central, straight path.
If this sounds eer