Before I get death threats, I fully understand, and agree, that a horse should know his job, and I also understand that you want some things to be “automatic”. However, in my opinion, the “automatic” should never override what the rider tells the horse. In other words, the rider can allow the trained horse to perform certain moves on its’ own, but the rider should always be able to shut off the autopilot and guide the horse at any given time.
Just food for thought!