For the most part, I have only positive things to say. Your lower leg is excellent, and in most of these photos (#5 is the exception) you are out of the tack the correct amount for the size of the fence, right over the middle of your horse, with an admirably flat, relaxed back.
Photo #2 is the best hunter seat equitation photo, and you're executing a lovely intermediate release, a correct crest release, with knuckles pressed into the neck rather than floating above it, and a nice amount of slack in the reins.
You do have a tendency to overfold your hip and be too close to the horse's neck for the size of the fence. This is a hunter rider's mannerism, and I've certainly seen much worse, but as you continue to event, you'll want to make sure that your effort over the fence match's the horses. Photos 3, 5 and 6 all show you with more fold in you hip than necessary for the size fence and your upper body too close to your horse's neck.
Your pony is cute and able, and an athletic jumper who's appropriately round over her fences (which speaks to your tactful, correct riding - restrictive riding makes for flat jumpers.) However, her expression seems to indicate that she's a little bored or sour, and while she's clearly capable of jumping in excellent form, sometimes she doesn't bother to be as tight with her front end as she could be - photos 1, 5 and 6. In photo 1, she's just a little loose in front, in 5 and 6, she's tight below the knee but hasn't gotten her forearm up to horizontal.
I think moving away from the hunter ring for a little while and having some fun with eventing will be great for both of you. It will sharpen your all ready considerable riding skills and get her interested in her work again.
Overall my impression is of an able, athletic pair that's ready to take on new challenges. I'd love to have you and your pony pony in my barn.