This may seem counterintuitive but stick with me for a bit.
Let’s step off the mats for just a second and look at learning a golf swing. The golf swing can be broken down into many parts. Let’s just look at the setup as outlined here 50 Best Swing Keys. You need to have your legs properly positioned with your feet outside your hips, and your toes pointed outward at a 25 degree angle. Now you need to have your upper left arm on the top of your chest, and your right arm needs to be slightly bent at the elbow. Then you need to have your right shoulder slightly lower than your left, and you need to be holding the shaft perpendicular to the ground.
That is a lot of stuff to do and you have not even started to move yet. The article goes into much more detail about how to properly smack the life out of the ball.
Even if I did have some knowledge of golf (I don’t) taking in a long list of different aspects all at once is a lot to ask of someone wanting a better swing.
The same thing can happen in BJJ if you are coaching to correct every little detail, the learning process can actually slow down. Instead fix one or two main things, and acknowledge one or two things that are done well. When the corrections have been made, build on that by fixing one or two more things.
Teaching too much can make students overwhelmed. Frustrated students are not in the state of mind to learn.
You might think that this coaching advice is mostly geared toward helping new students. I would argue that novice or expert will struggle to make more than one or two corrections at a time.
We can all improve, gaining knowledge needs to be at a rate that is conducive to learning.
Ideas for this article were inspired from the books Practice Perfect: 42 Rules for Getting Better at Getting Better and Peak secrets for the new science of expertise