Thanks for the advice everyone. I'll just stick with the White Crane for now. I just am a little nervous after hearing that my Instructor's Instructor's Instructor had to spend 3 years learning the first form of White Crane, only to go to another master and be told he had been doing it all wrong, and that it was too hard, and so spent another 3 years on it to get it right.
Well, also keep in mind that different folks in different generations, may have had a different understanding of this stuff. There often is not simply one "correct" way it is done, with all others being "wrong" 100%, once lineage has split and there is no single guiding authority.
That being said, you do it the best you have learned, until you find someone who can teach you to do better. And that sounds like what happened with your Great-Sigung, and it does not mean that what he had been doing prior was absolutely wrong, it just means he found someone who could teach him better. But, what one man did a couple generations ago may have little bearing on how your training unfolds today.
I went thru it myself, had a sifu who later took me to his sifu, and I became that man's student, at which point the quality of my training improved dramatically.
Just keep working on the white crane on its own merits, that's the best way to develop your skills in white crane.
And keep in mind, a form is not a commodity. It's not something you do for "perfection" in the sense of it being performance art. Rather, it is a tool used to help you develop your skills. As you practice your form, if you are going about it correctly (meaning, your approach to the training is correct, not necessarily that your execution of every part of the form is necessarily perfect), then you are gradually developing your skills. Forms are training tools. With them, you build your skills.
When you go to buy a house, it is the house that matters, how well it was built. It is not how shiny the carpenters tools might be.
Your skills are your house. Your forms are just tools in your toolkit.