It seems to me that AMD intends to do "big core" class CPUs with K12/Zen. They are routinely talking about how they've basically exited the low end of the PC market and want to improve their product mix in PCs.
They also want to gun for servers, embedded, etc.
This tells me "big core" -- or at least, something much more like big Core than like an Atom.
Talk is cheap, I'm looking at where they are putting their money in:
- A big core is a complex and expensive venture, how do you expect them to compete on this cutthroat embedded market with complex and expensive IP? That's right, you don't. In order to be competitive on this market they need a heavily cost-optimized part, otherwise it's the next-gen console and that's it.
- Despite all the talk about servers, they put actual money on the Microserver market, not on the high end server market, so I don't think they would acquire Seamicro just to design products to the high end server market. Don't forget that the aim of Microservers is to compete against high end servers. Microservers were basilar to AMD's strategy, and I cannot think of this fact not influencing the product scope definition of K12 and Zen.
So I don't see their strategy pointing out to a complex core like Core or Bulldozer, but more to a cheap, efficient part. It may be bigger than cat, but it should not be as big as Core or even Bulldozer in terms of complexity and performance envelope.
Ed: Btw, if they don't consider what they have now being low end, what's the low end for them? Someone at AMD BoD is delusional about their place in the food chain.