The certification is about easy recyclability not about recyclability in general. While it could be taken that they are saying their products are not recyclable anymore one could also say that they are just accepting that they aren't recyclable with standard tools anymore. Given the new retina laptops this definitely makes sense and its nice to see them volunteering to remove themselves before being removed by the organisation.
It sounds like products are certified on a product-by-product basis, and this decision was more about not wanting consumers to wonder/worry about why one Mac laptop was certified and another wasn’t.
No, it's about trying to kill the standard. Many institutions can only buy epeat certified hardware. If the standard doesn't say what Apple wants it to say, then Apple will stop them from buying any of their products, even the ones that comply. Should be an interesting standoff.