I agree with you, Formicida.
Crowley's placement of the Emperor on the 28th path is perfect and it also high lights a prime piece of Victorian moral values.
The magical images of Yesod and Netzach literally scream animal attraction. The magical image of Yesod is of a Strong, beautiful naked Man. Some sources suggest a very phallic nature as well.
The magical image of Netzach is of a Beautiful naked woman. Some sources describe her as the Amazon to indicate the very primal and instinctual nature of Venus that is present in the Sephira Netzach.
So what does that tell us about the 28th path? It's going to be one heck of an explosion.
The Emperor fits the bill perfectly. He symbolises the heat and fire of sexual attraction. His attribution of Aries connects with the Springtime and all of it's natural associations. The Hebrew letter Tzaddi, literally meaning Fish hook, ties in with the symbolism of attraction.
The 28th path is deffinitely a path of sexual energy. That's why the old attribution of Star seems like such a mismatch. But I'm sure it fitted in perfectly with repressive Victorian moral values though.
Of course there are different aspects to the Emperor. One is control. It's well known that Western magical practices and Eastern yoga techniques use the sexual force in a controled way to bring about enlightenment. Tzaddi also means meditation.
In my opinion people who object to the placement of the Emperor on the 28th path do so because they have an incorrect idea of the kind of Venus that Netzach represents. Netzach is the home of the firey, passionate, and wild Venus. The one that will literally rip your clothes off.
The more traditional side of Venus relates more to the Empress on the 14th path.