The phrase "essentially revolve around" is correct and usable in written English.
It is typically used to mean that the subject of discussion is largely dependent upon or defined by a certain idea or concept. For example, "The discussion essentially revolved around the potential outcomes of the upcoming election."
Cultural and social activities essentially revolve around religion.
It's an unreal world, in which a series of attractive women essentially revolve around and invariably succumb to the charms of the hero.
These foci essentially revolve around the therapeutic areas of coagulation, malaria and clinical toxicology.
Lots of Internet start-ups will use the jargon of the start-up, but the job will essentially revolve around writing tasks.
Unlike Reus and Gotze, Schurrle prefers to play his football on the wing with his game essentially revolving around his astounding pace and clinical finishing.
The cast is large and the plot, essentially revolving around three different racehorses and the people connected to them, is not always easy to follow.
Comedy fans will recall the Monty Python's Flying Circus barbershop sketch, which essentially revolves around a barber who hates cutting hair.
The site essentially revolves around users adopting an identity and an avatar that may, or may not, bear some relationship to who they are in real life.
Culturally, it's now like the very idea of taking a risk is seen as bad form, which seems remarkable in a country where the economy essentially revolves around gambling.
Bang's book is a verse novella that caroms here and there but essentially revolves around a certain Louise, based loosely on the silent film star Louise Brooks, and a cast of Scott- and Zelda-like characters, including Louise's sister Lydia, her lover, Ham, and various other sybarites.
His country desperately needs help, and if North Korea takes the necessary steps to get off the State Department's list of countries that support terrorism -- which essentially revolves around what to do with three members of a terrorist group, the Japanese Red Army, who are wanted by Japan -- the regime will qualify for support from the World Bank and the International Monetary Fund.
