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