Yeah, hooker is the real area of concern right now. Second-five to a lesser extent as well. It is easier to convert another outside back to second five though then develop a good hooker. I think we have plenty of young talent. The transitions in the past have been pretty good. Generally, we have clear replacements for most positions. I think the only thing that would screw us over would be if say McCaw, Carter, Nonu and Smith all retired in the same season. Hopefully it is a slow, gradual transition rather than something that happens all at once. Generally an era of the All Blacks seems to merge into the next one. We just need to keep replacing one player at a time. Keep a bit of youth and a bit of experience.
It's also worth remembering that in 2015 the stars of the All Blacks could very well be those who were not quite there in 2011. In 2007 Kaino was considered a bit of a disappointment and in 2011 he was immense. Nonu and Weepu missed out in 2007 also. I predict it will be players like Freuan, Kahui, Vito, Messam, Ben Smith who will really shine in four years time. Most of the young guys now with the exception of the exceptional ones (i.e. Ardie Savea) may have to wait until 2019.