Cutting away half of the time wouldn't have the same effect...
That's really silly to assume.
You don't even realise that turning a 5 second cut into a 2 second cut will speed up the scene...
This
Isn't true either. The bridge for example is where Manato watches the sunset, basically his special place, where they as a group used to watch sunsets and later where they'll watch the sun rise, while Haru and Mary are at the town entrance.Then we get the same shots of the same place earlier, only this time, with Haru and Mary walking in it. Then what was the point of showing them earlier..? The music actually had to be looped to fit the stretched out scene, so it isn't like their trying to match the music (which can be edited shorter anyway).
The place with the wooden frame is where Manato sat down after their first kill, all in all, it's scenery we've seen in a "spring" theme. (from a different angle)
Doesn't really matter a whole lot, the important part here is for example, the snowy landscape (that started to appear after they said farewell) and what it means in japanese culture.