Zephyros
Suppose an old unknown manuscript would surface with the initials A.C. upon it, stating that the ED's are not about the importance of a card, but about it's meaning, you would likely say to yourself that you knew there was something lacking. Liber T was published still before the 20th century, and maybe Crowley would have revised it in his later years if he had paid attention to it.
Maybe, maybe not. In any case nothing exists in a vacuum, and the EDs don't stand by themselves but as a part of a greater system. I assume the rules regarding them weren't decided upon arbitrarily, but due to other esoteric considerations. Apart from the common sense adage that fire and water don't mix, esoterically fire is active, pure force, while water is its inhibiting counterpart, diametrically opposed. I do agree with you that the examples given by both Mathers and Crowley are unclear, but I find the basic rules easier to understand and emulate. If such a manuscript were to be unearthed, it actually wouldn't change much, and this goes back to the GD's conception of Tarot and divination as a whole, in which the divinatory aspect was separate from the deck itself and significance. The OOTK isn't your typical divination, it is a lengthy meditative process to which adepts probably supplemented certain rituals, adorations (such as to HRU), etc. and it doesn't go well with the "does he like me" kind of questions. But I'm guessing that meditation on the cards, their meanings and interconnections was what it was mostly about. Meditate on Tarot and you discover the spiritual mechanics of the universe; practice magick and you use the mechanics to your advantage.
I am a little bit at a loss, because your attitude differs considerably with the respondents to my thread http://www.tarotforum.net/showthread.php?t=204059. But as I spent so much time to get this ED thing right, while trusting on an authority, I understand your point.
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This was just what I wanted to make clear. The part is not the same part when you isolate it, because it is part+interconnections.
Well, one needn't go to either extremes. To me the occult is a language through which any idea can be expressed. Both the Thoth and the RWS speak the same language but say very different things with it. Don't forget that this is what the GD itself did; theories were proposed, some were found to work and became canon, some didn't and were discarded. Crowley did the same thing. But then, if the EDs give you such a hard time, don't use them.