Mattmorgan, usually I look up other posts before answering, and I apologize for not doing so this time round because I was missing a lot of information which is actually there! And of all the posts to miss - because you guys covered a lot!
Ok, you want to talk only about your playing here, but I think there is cross-over, so please do indulge me. Like my initial thought (before reading anything else) was that "If this person is about to start with a teacher who has seen him once, this is not the time to start making changes according to Internet advice." Now I've read the whole story. If I were to write in the "teacher choice" thread, I'd end up referring to this video. And in writing here, the teacher story also comes up in my mind. So is it ok to talk about both here? (If you want I could try to address it in the other thread - or maybe I should do that too).
Like for the feedback part: If your teacher were about to launch into guiding your physical playing (which I thought), then deciding to sit lower or higher, adding more finger action to arm motion etc. could undermine her plan for you. But when I read about "Piano for Leisure" and needing to ask about distance from the piano, then I'm thinking that maybe this plan doesn't exist. And if it doesn't exist, do you want to continue trying to shape your playing through Internet feedback? (I've gone through some stuff myself.) So for me it does come back to that. But I will address that in the appropriate thread.
Your playing had elements that I'm trying to get, because I was totally self taught decades ago, and my motions were fingery and sort of "in blocks". From the LITTLE that I understand, that's a good thing to build on (that a decent teacher would want to build on.) That's all I can say on that matter.
I also knew of many other teachers from a previous generation that had a certain playing technique or style and they were very strict in teaching it. I knew times and this thinking had changed a little, but now I believe that way of thinking has changed a lot. It seems there are many different playing styles and techniques and people aren't so strict about any 'correct' technique.
That's a million dollar question, and one that I've been addressing big time as a student. (I am with a teacher now.) Here is what I understand:
There are some things that are efficient. For example, if you sit at the extreme bass end of the piano, or stand up or sit on a foot stool to play, your ability to play well will be compromised. Even if you are very talented, you'll have limitations, and the risk of injury is huge. The two factors are the human body and using it efficiently, and the nature of your instrument which you are acting on physically with that human body. There are some optimum ways of doing that, with a range of variability around that which depends on your personal body, temperament, nature of the particular music etc.
Ok, so then people try to codify this set of optimum things. You get into the "holding the ball" of decades ago which had its roots in roughly the shape your hand might adapt when playing closed position white key music - but it gets turned into a rigid (harmful) rule. You get "relaxed" which can become "limp", and a dozen rules. If we try judiciously to shape our bodies to those rules, we may also get in our own way. If you took something that you do naturally such as walking, and tried to do the "physically correct walking motions" you might make yourself stiff and awkward. Supposing that you are given varied music to play, and told to produce a good sound while seeking the greatest comfort. You would experiment back and forth, and the final result might be something that is "good form" which comes from inside. That's another side of it. I'd want a teacher who is observant, has an idea of efficient body use, is able to tell about my own body use, and could guide me based on all that. I might shy away from a teacher who has a rigid idea of "what is right" and imposes this on all his or her students because it's a rule.
(Going to the other thread now.)
And thanks for answering so thoroughly here.