I would rather not see a Year One spin-off. I'm not into Wesley's Kirk and I don't care much for the SNW showrunners' approach to Trek. That being said, if there has to be a spin-off, I think there's far more flexibility to spin-off Number One, La'An, Pelia, and Ortegas on a different ship and it could be a parallel series to the Original Series, with the occasional crossover with Kirk's Enterprise. They aren't running into as many imposed constraints, and they could use the series to delve deeper into many of the species and stories that are in the Original Series, as well as have their own stories with new opponents.