I really don't see a reason for the Athlon II series to exist on FM1, let alone on the replacement socket. As it stands, the cheapest quad core AMD offers on FM1 (or at least newegg has) is $90 for a 2.8ghz Llano with no IGP. For $5 more you can get a 2.6ghz quad core Llano (A6-3650) with the integrated HD 6530D.
Sure you lose 200 Mhz but you gain an IGP with performance worth about $50 or so. The IGP has 320 stream processors @ 444mhz and is DX11 compliant with UVD3. Basically enough performance for a budget build expected to use a sub $100 quad core to get great performance. You get an IGP that sits somewhere between the HD 6450 and HD 5570 (depending on game and memory used - DDR3 1866 or above provides best performance it seems) for only $5 more, why miss out? Even if you planned on adding in a dedicated GPU, you could always use asymmetric crossfire it with the IGP and get even better performance. So I agree, a little confusing. Unless perhaps, these chips are only launching as weak bins and the IGP didn't have fully functioning stream processors or something.
But I really do support Llano, they make wonderful "budget friendly" multipurpose systems. My only wish would be to see power consumption and heat output drop even more, then I'd really have no trouble swapping out the i3 2100T in my HTPC. But then again, I'd probably save enough being able to use the IGP instead of the dedicated HD 6450 anyway.