Yeah, the name. Totally understandable why they went with it, but damn it's easy to make jokes about it. Unfortunately "Original Sin" is already the subtitle, unless you mean like, the tagline. Or maybe it just needs a second subtitle?

Divinity: Original Sin 2: The Confession

Divinity: Original Sin 2: Revenge of the Semicolon

Divinity: Hipster Sin

Divinity: Would you stop sinning already?

Divinity: Sinning all over the place

Divinity: Bed, Bath, and Sins

And just wait for the EE:

Divinity: Original Sin 2: The Confession: Enhanced Edition