When we visit our boys in Arizona, I try to play a round with one or both of them. I can tell you, the most enjoyable times for pace of play is in the Summer at mid-day/early afternoon. There is nothing like 100+ degree weather to thin out a course and make pace issues disappear.
If I saw a father spending quality time with his son or daughter, I wouldn't care if his teaching was flawed as long as both were enjoying the time together. The only thing that would bother me is if the father was yelling at his son or daughter if the child was not doing it right in the father's mind.
I've taught our kids how to do a lot of things, including golf, and right or wrong, it didn't really matter as we had a lot of fun. I guess the proof that it didn't matter resides in still enjoying a number of sports, including golf, together.
The biggest flaw in some parents is not incorrect teaching, it is living their failed athletic careers through their kids in the hope that their kids will bring the success they missed out on.
I guess I was a 100-ish shooter when I started playing 21 years ago, when I was 13. Lowest I got was a +2 for a few months but hung around 0 or +1 most of my time in college.
The goal is to keep the 1 handicap but play like a +2, gotta manage that handicap
I think an active lead knee (or both knees) certainly helps with sequencing. In order for the knee to move forward and around (and straighten) it helps for it to gain some flex and rotate internally on the backswing. Creates some "flow". I basically described what I mean by active knee movement in my previous post in this thread.
Like I said, doing the knee stuff in of itself might not be the answer, have to consider how the torso is working to facilitate the motion/pieces.
While I love Jack's swing and think there is a lot we can learn from it, he was a special players and he would have been just as good with a swing where he kept the lead heel planted.