You should be able to turn the habitats around to be able to view them at the proper angle based on where they're put on the island. It's probably not possible but it would be great if you could decorate the habitats too. Also it would be great if you could turn the feeding houses, training houses at different angles.

Many of the habitats have high backs, so by turning them the view within would be obstructed.
You can decorate the islands with many different items, I don't know why you would want to decorate the habitats, your view of the dragons themselves would be blocked.