It sounds like you have gotten some solid advice. Over the last year I have taken quite a few lessons,not even sure how many but for a while it was weekly so I would guess over twenty. One of the things that struck me before too long was that the skills my instructor was having me work on build on each other. In other words, I had to gain some proficiency in one skill before it was worth trying to work on the next. If felt really slow for a while, then things started clicking together and my scores started coming down. In your first post you mentioned that you didn't feel like the pro was tailoring anything to you particularly. This is likely because he was starting at the beginning, a place he's started at with various people many times most likely. I don't think you can expect to see a lot of real instruction tailoring until you have gotten past the basics. The good news is that if you practice your putting and pitching some along the way, you will be shooting around 90 pretty consistently by that time!
I have no doubt that you are correct.
Funny story - I went to the range today and while I was getting to the range, I saw the instructor I took a lesson from and the head instructor and mentioned that I had gotten some advice to flare my feet and the head instructor asked how much I had paid for that advice and said that I should only listen to the guy I took the lesson from since I was paying him. Thought it was rather dumb since no one person has every answer so I just chuckled and left to hit balls.