Yes, you are right about the Intelligences. I referred to posts here, and not the ToL text directly, and made an error. But it is not relevant to my post in any event.
The Intelligences are not the way I analyzed it, because it is not the only way of looking at it. If Tzaddi is not the Star, and Heh is being put in its place, the question becomes about the Paths, since that is where the letters are located.
The Paths themselves should describe how one Sephiroth flows into another, and it is greatly affected by which Triangle is in operation. We must remember that Heh operates in the Supernal Triangle, which is beyond human comprehension. Tzaddi, on the other hand, operates in the Astral Triangle, in which the conscious will and mind operate, Netzach and Hod. Tzaddi is usually ascribed to the Star, "meditation".
This is a very practical way of looking at this switch and why it would be made.
If the Star is Heh, then something which was traditionally ascribed to a Supernal operation is personalized in the Astral Triangle...chiefly the part which connects the Will (Netzach) to the inner astral, premanifestation of that desire, Yesod. Heh is the Window, and it is spelled HH, to signify that the one who looks out is the same as the one who looks in. Is it Crowley's way of signifying that the personal will is the Divine Will? The Emperor is concerned with Logic and Reason, not Meditation.
The Emperor/Heh however is normally attributed to that which is in the Supernal realm. In fact, the magical image of the Sphere of Kether is "a bearded man in profile". This image is used for the Emperor in the BOTA Tarot (Heh). That is why it seems helpful, seeing as though there are so many ways of looking at this, and that it is speculative, to see how Heh would be ascribed to the Star, which is below the Supernal realm.
That which is above is that which is below? Supernal Will is mirrored in the personal Will? I think that, because it is Crowley's way, to be concerned with Will. Love is the Law, Love under Will. Netzach to Yesod IS about the operation of the Will and it seems he wants Heh to associated with that Path, if Heh is appearing where Tzaddi would be, on that Tarot Key/Card. Furthermore, there is a consonance with the image of the Thoth Star and the Universe so it once again, to me, may hint at ways in which the Supernal operates in the personal will and what we manifest. Because that is more of what the Tarot is about of course, on an esoteric/Qabbalistic/Western Mystery level...aside from how we look at it, as "cards to be read".
All speculation...thank you...so interesting to me what other thoughts are about it. A fascinating subject to me always.