Barleywine
I agree with the sentiment, not with the reasons for it. Leo may be "Lust," but it is a very specific kind of lust, and relates in a very specific way to its position on the Tree. This kind of Lust is only possible when directed, and the only viable direction is True Will. The ecstasy shown is K&C, only possible through rigorous discipline in performing one's Will, but only that and nothing else. The Book of Law mentions "strange drugs and wines that foam," but only in service of Will. Debauchery isn't what Lust is, since ecstasy must be directed, otherwise you're just a drunk junkie with STDs.
The difference is that in Strength, the Will is in service of some deity,according to old Aeon thinking, and so natural impulses are suppressed. Lust says that because "every man and every woman is a star," the "deity," if it can be called that, of each person is their own Will. It actually demands far more discipline and responsibility, because when worshipping a deity your personal responsibility is a moot point, and your reward for following the rules is assured.
For me, the key concepts have always been "thou hast no right but to do thy will" and "pure will, unassuaged of purpose, delivered from the lust of result, is every way perfect." As you say, it is a different kind of Lust. Looking beneath the gloriously lustful language, I see no hint of debased appetites in the inner meaning here ("But always unto me!"). The suppression of natural impulses is reserved for those who fail, who are sorry or who hold fear in their hearts (2:46); in other words, those who are compelled by the guilt syndrome of so many exoteric religions.