A) Nope.
B) Nope.
My explanation for B) is simple. I wouldn't buy a book that had those rules, but almost certainly would/will continue with my DDI subscription if they had a 5E Monster Builder online tool, and would just use that to build new monsters instead.
For the most part I don't need new monsters. Usually, I just want leveled-up or leveled-down monsters that already exist. Online tools are much more useful to me than doing it all by hand.
B) Nope.
My explanation for B) is simple. I wouldn't buy a book that had those rules, but almost certainly would/will continue with my DDI subscription if they had a 5E Monster Builder online tool, and would just use that to build new monsters instead.
For the most part I don't need new monsters. Usually, I just want leveled-up or leveled-down monsters that already exist. Online tools are much more useful to me than doing it all by hand.