“the horse is on the forehand because of the unstable seat”
ok, this one really got us rolling on the floor. if this girls seat is unstable, the rest of the dressage world needs to just quit and take up knitting. in fact, her seat is very decent. if this horse is on the forehand, i have some ocean front property in iowa to sell you!
THAT REMARK reminded me of the time i had some smartass over for dinner and we watched tapes of reiner klimke riding ahlerich in the highest scoring test of his entire frikkin life!
‘who the f*** is that old guy? god, he’s so loose in the saddle, LOOK at him flopping around, MY GOD, his ass is popping out of the saddle, he looks like crap, why do they let people like that compete at that level, MY GOD!’
i mentioned it to my trainer, she laughed her ass off, ‘YEAH, and that’s why the horses LIKE him so much, because he’s soft up there, he’s soft, supple, the HORSES love it’. that was accompanied with the tale of the (international) coach who ran up, grabbed my friend’s leg and started screaming, ‘look, betty moved her leg! call the wire services!’ you HAVE to be able to move and be soft and supple.
i’d MUCH rather see someone’s butt pop out of the saddle than see them sit like a statue and drill two holes in their horse’s back! at least they’re not killling the damn horse’s back!
The problem is that your whole concept of what an effective rider is, and what they look like at any point in their development… is… wacked.
“the curb has to be engaged to do this work”
you’re not really serious are you? come on, even my SO laughed at that one. we do pirouettes in the snaffle and with the curb rein ‘turned off’ all the time.
the curb bit doesn’t make collection, you have to be able to ride the whole GP test in snaffle to say it is schooled right. if you think you have to have the curb rein - what? ‘engaged’ to do a pirouette, you are going down a very, very bad track that’s not going to help you advance.
" i don’t like praise when the foundation is missing’.
But that is EXACTLY where I saying you are wrong. You’re saying, ok, I could have been more polite about it, I’m saying, you’re just wrong. Polite or not, you’re wrong.
Number one. Praise is ALWAYS in order.
Whether it’s bad or good, whether you’ve done it or not, praise is always in order. Why the hell treat a rider like crap if you treat horses well? Do you expect a horse to get better with nothing but picking and criticism? Then why would a rider respond to it?
Number two. When you haven’t done the work, you can expect to get some blowback if you criticize it. Sure you’re free to criticize, but don’t expect everyone to agree with you, especially when they’ve done the work and you haven’t. It’s VERY POSSIBLE that your POV is wrong, if you haven’t done the work, it’s easy to make a lot of assumptions.
Number three. Perhaps you’ve been very frustrated in your efforts to move up, maybe that’s why you’re so hyper critcial of those doing so.
Number four. There’s a time to start working on the next thing. She’s ready to work on this.
Number five. It benefits YOU NOT AT ALL to just find fault - with anyone or anything. NOTHING. All it does is make you negative. You have to be able to get a more balanced view. What’s right? You didn’t even try to find that.
Here’s some hints. The horse is doing the work. The horse is straight. The horse is in a very appropriate gait (amt of power). The horse is not pulling. The horse is very, very obedient. The rider is sitting up straight and even in the saddle. The rider is not losing her temper. The rider is learning something new and is not acting like an asshat. The instructor is giving VERY appropriate guidance. With that sort of instructor, this girl doesn’t need ANY criticism from ANYONE, because the instructor can handle it.
It’s not that the foundation is missing at all. You think so because you haven’t done this work. 
The foundation is there - for the previous level. Look how bloody straight the horse is when she goes on the long side. She’s ready, the horse is ready, so once again, it’s time for the shit to hit the fan, and things to look like shit again. This is what moving up is.
You may have some very romantic view of it because you haven’t done it, or because someone has been blowing sunshine up your overalls, I don’t know, but it’s you that’s on the wrong track.
You know what happens when the best trained rider in the world does the GP zig zag for the first time? His damned horse runs right through the other end of the ring, he will leave out the last 3-4 ZIGS, or something ELSE goes horribly to shit. Welcome to dressage! It isn’t easy, and moving up isn’t pretty!
I’m guessing you dont like it because the horse’s head is up and he’s doing a very soft, short canter. His head is up because that’s the way he’s built, and the short soft canter with out excess power is perfect for her to learn on. Her butt pops out of the saddle because she’s learning the pirouette canter.