I think you have improved by miles! First of all, your form is a lot better. Your leg is pretty solid under you (though it still slips a bit, but I know it's a continuous thing people have to work on. Me included) compared to the first cross country schooling you guys did where we first saw you jump something over 18". You are right over the center of your horse and not jumping ahead which is nice to see. Your back is nice and flat without completely folding over. Even when your horse chipped in, you were still over her center, which tells me that you have a good sense of balance. Even after a hand surgery and some time off
The only thing I would suggest is that you release a bit more. While you didn't quite catch her in the mouth, it appeared to be pretty close. Just do a bit more of a release next time and I assure you, the feel of the jump will be 1000% better.
Sandie looks like a really cute little jumper. She doesn't have perfect form (who does?) as her lower leg is still hanging a bit but again, she's green. Her knees are even and up which is what really counts to me. Gridwork would be good for her because bounces and one strides would teach her to pick up her legs and even them out a bit. It will come in handy when you get to Beginner Novice stadium.
Overall, very nice. You are exactly where you need to be when jumping 2'3". I'm excited to hear what you do with this new trainer and your adventures next season!