Huge improvement - you look very secure and your horse's jump appears to have improved as a result.
There are a couple of little things I see that you can work on. First of all, you're jumping ahead very slightly. As we all know from reading GM, there's a number of reasons for that. I've found that work without stirrups and gridwork, though tedious, are the BEST ways to make you wait for your horse's jump (which is especially hard when you're expecting a BIG jump - I feel ya there!).
Your toe is turned out at a pretty extreme angle - as insignificant as it seems, adjusting your stirrup so the outer branch is ahead really does help! It'll make it **** near impossible for your toe to turn out so much.
I think you have a super base of support, you look very focused and confident, and because of that, I think working towards an automatic release would be the next big step. I know it's not super trendy in the hunters but if you school it at home, at least, you will have another big notch in your belt that will allow you to then make those micro-adjustments in the air that will make you more competitive. Your release in the last pic strikes me as just a *tad* restrictive, and I think if you learn the auto release, you'll find your horse's shoulders will come up and his neck will reach down. He's a lovely looking horse and you look fabulous. Good luck with moving up, and congrats on making such an improvement! :)