I can see why you like her
These vids are from over a year ago - I'd love to see an updated vid.
I quite like her neck - yea its thin but she's using all the right muscles and has a drool-worthy neckset.
Her gaits are not great but are not bad either
She is a long-legged lady and her reach at canter could be better and affects her carrying power, but she has a solid 3 beat TB canter that I can see being adequate for low to middle level dressage, and very possibly higher. I never say never
Trot is balanced but lacking impulsion, as is the walk. I'm not a fan of the riding (waterskiing and chair seat among other stuff) or the saddle/pad fit, so these things are affecting the mare.
I love her bright color and I LOVE plain bay horses. And the big'uns
I'd go see her if I were you!