These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Proposed by his original actor: Khashoggi is a Bohemian sympathiser, and is working within the system to bring about its downfall. Given that he is essentially the person who puts events in motion, there is support for this one.
Is Killer Queen really a Corrupt Corporate Executive? Maybe she's just trying to run the planet the best she can, and stop people being hurt by the rebel uprising who are searching for something long lost?
Admitedly, the earlier productions make it clear that the Killer Queen simply runs the world to her own whims, and is trying to stop the Bohemians because they don't want to play her game, and she doesn't understand why.
Then we come to the theories on Galileo and Scaramouche, the most popular of which run along the lines of:
Galileo could be the reincarnation of Freddie Mercury
Americans Hate Tingle: The only U.S. production to date lasted sixteen months at the Paris Las Vegas Hotel & Casino. While not an instant flop, it rarely played to capacity audiences and critics, while not vicious, were underwhelmed.
Draco in Leather Pants: Khashoggi to some fans. To be fair, it's never quite clear where his Character Alignment lies. It is agreed amongst fans that he may be the only competent employee of Globalsoft as it all seems to go very badly after he is removed from his position.
Ear Worm: You will come out of the theatre singing these songs.
Ensemble Darkhorse: A surprising number of the background Bohemians are popular throughout the fandom.
Fridge Logic: Why did Khashoggi leave Galileo and Scaramouche in the same room, considering he knew the full prophecy?
Actually explained vocally in the Las Vegas production: He does it on purpose.
Take That: It seems, at least from the plot of the musical, to be clearly pro-rock and anti-(or very critical of Pop Music). Shows like American Idol and stars like Britney Spears (who, interestingly enough, appeared in a Pepsi commercial with Queen members during Britney's peak of popularity) come up for a pasting.
Vindicated by History: It may be too soon to tell, but the show was absolutely savaged by the critics when it opened in 2002, where only the individual performances of a few of the cast were remarked upon positively, and faced cancellation twice, but here it is, a decade later still selling out on a routine basis.
That's mostly because it underwent a drastic rewrite after the opening weeks.