No i understand. At least i think ^^ You are talking about the rating "Excitement" in the Coaster Tab? Every Ride has three Ratings which the Guests use to chose what Rides they want to go on. Excitement, Fear and Nausea. And at the Moment adding Scenery doesn't change any of those.
I understand, i was suggesting it so that adding scenery to a rather dull ride could spice it up. having dinosaurs around your water ride(video example) or some other ride could make it more scary than adding clowns or candy canes.
in this way scenery could play a big part in how a ride behaves and what kind of peeps it draws.
it could be that a coaster or a ride looks in the vicinity of itself for the type of scenery used. The scary, exciting or funny rating could be shown on a prop, or could be altered by the user.
Making scary clowns available as well.
Still.. only suggestions and thoughts, this makes placing scenery, trees etc. a must do, instead of an option.