Pascal,
Anything is possible, of course, but the question is cost. Obviously it would be more costly to create what is essentially a new platform for the Phase back lineup than it is to continue doing on on a lineup of backs where this work has already been done.
Then the question is a business question--will I recoup my costs? Would I have seen similar sales volumes anyway, just on a different platform? And so on. I firmly believe Phase is simply being careful with their expenditures -- it's a tough market out there.
That being said, I do think there is hope for an AFi-II 12, for the reasons I cite above.