Yes, I do agree. I need to work with my mare more if I want her to 'really' improve. Yes, she is very head strong (physically and mentally). If she wants to go somewhere else, it is quite a battle getting her to do otherwise. I just thought that the bitless bridle would aid me without causing extra pain that a bit might give. I use a full cheek snaffle bit, I can't use a lot of other bits as she has a habit of letting the bit slide in and through her mouth (she has a big mouth). When I drive, I use a french link butterfly (always on it's easiest setting).
However, keep in mind that she is a turning 23 year old Clydesdale mare who's main focus has always been a driving horse in harness. Her riding training is so basic...I am lucky she is even broke to ride. Now, she is very gentle in nature and I would never expect her to rear or buck, or do something horribly ill under saddle. It is not in her nature...I do not believe she is very familiar with a lot of leg pressure, it does help me to turn her sometimes though... I, myself, am no expert rider or trainer. What I am trying to say is that she is not a typical riding horse...
She is so much different under harness...I can take her anywhere. Under saddle, wow, she turns into a sour head. It helps a lot when I ride with blinders.
I think regular riding and working her will help me with her. Although, I like to drive more than ride. However, I think I will still get the bitless bridle and see if it does help me... I will post my results with it. :)