I think bitless is an awesome way to go. I ride both my horses with rope halters or a hackamore sidepull type bridles, but neck rein. I think the relationship and connection with the horse to where they are sensitive to a soft feel is the greatest thing.
I can have my horse to a full gallop or manuvering through the bush with a rope halter and they are totally responsive and obedient to my slightest pressures. Even if spooked or startled...they are totally confident in my leadership and a bit has nothing to do with helping them be under better control.
I rode a guest ranch horse recently with a bridle and it was so desensitized that the hardest pull on the bridle meant nothing to it. It was horrible. I know that bits can be used properly, just like spurs....with very light touches and feel.
Like I always say, your connection with your horse starts on the ground....eye to eye...heart to heart.