My opinion is also that it isn't a good idea to teach Milton's or other alternative ways of CBL and similar figures on beginner's classes
But it's not because it would be hard for beginners to learn it. There is another problem that I faced on some ballroom hobby classes. Some teachers were claiming that leader is responsible for almost everything in the couple. While this actually is a sort of true, insisting on that produced followers that were not able to remember even their steps in most basic figures, so they were totally depending on leaders. And leaders were not able to lead them properly, as they never danced with a good follower to get a feeling how to lead them . So couples were pulling or pushing and arguing with each other whole of the time and everything was a big catastrophy.
Learning beginners this way would do the same
But it's not because it would be hard for beginners to learn it. There is another problem that I faced on some ballroom hobby classes. Some teachers were claiming that leader is responsible for almost everything in the couple. While this actually is a sort of true, insisting on that produced followers that were not able to remember even their steps in most basic figures, so they were totally depending on leaders. And leaders were not able to lead them properly, as they never danced with a good follower to get a feeling how to lead them . So couples were pulling or pushing and arguing with each other whole of the time and everything was a big catastrophy.
Learning beginners this way would do the same