Well, high, low ...how about different? Ricardo Vidort used to say that his students will only need a total of 8 classes before they are on their own and capable of the dance. (Tango)
You've had 8 classes and are still working on ocho cortado. And I don't say that you are unusual. There is a lot about tango that is hard. I know that I had far more than 8 close embrace classes (privates) from a superb dancer and teacher, and well over 500 hours, perhaps as many as 1000 hours (lets see, 3 hours per night, 4 nights per week for two years = A LOT) on the dance floor before I began to feel good about my dance. And that was just close embrace!
In my opinion, to be a good "nuevo" dancer, one must first have sufficient mastery over close embrace that in most circles you would be considered an excellent close embrace lead. Say 1000 hours on the floor.
Then one must add to that all of the additional technique to make the "nuevo" leads work, to make them clear and enjoyable - a LOT more hours of classes/privates and a LOT of personal struggle.
Then one must have danced it enough to move beyond technique and be able to execute the dance without thinking about each step, or each move, or whatever. Say again, 1000 hours.
Then, and only then, can one begin to fit things into the music in a smooth, highly connected and flowing way.
Yes. A very high skill level. If you are watching unskilled dancers and complaining about them, well, ... what do you expect??