I'm surprised hot toys have actually gone this route with the eyes now that I think about it since there photography and build up to figures always seems to be detailed so I would of thought they would of considered this themselves.
They could have thought they wouldn't of been able to get impressive ( or at least more impressive ) photos with the eyes being stuck out to one side.
Unless of course they make the figures then send them to someone else who deals with the advertising and teaser photo aspects of it all.
Well, it's like Cannibal Jack Sparrow, because there's multiple heads, they're not concerned with limits. I think if the v2 were a lone head on a new Joker, the eyes would be straight, but where the main head of the BR figure is intended to be the slick hair, mask on head because that's how he is 90% of the scene, there's less care put into the versatility of the "bonus" head.