The death of Superman and Lois was fine, but then it was followed up with Blackest Nights. Zombie versions of them wasn't meant to be their final appearance. Johns set up something, but it never came to fruition...again.

As far as I'm concerned, Earth-2 Superman got reincarnated as Morrison's Jeans n' T-shirt Superman and now he's hopping around the Multiverse searching for his Lois, exploring the infinite realms of the DCU.