In real life you can easily have 2 people sit on a single horse, so why can’t we in Rust? It would only make sense if you can sit on a horse with 2 people.
Perhaps with the passenger sitting sideways making it hard to shoot from the horse so it will be used more for transport reasons?
I also don’t think there has to be any design changes to the saddle etc, just a new sit model for the passenger on the horse. (basically like the minicopter but you sit sideways so I don’t think its hard to implement.)
p.s.
I set this suggestion to ‘Improvement’ instead of ‘New feature’ as you basically update an already existing feature (horses) hope this is okay.