Note that this is not a full replacement of EMS by 'Even More'. The former EMS exit row seats over the wings are now called 'Extra Legroom' seats. They don't come with the free drinks/better cookies -- but are available for selection for Mosaic 1 flyers at booking time. Mosaic 1 members can select the 'Even More' seats (if any are left) at check-in.

I view this as a real upgrade for reaching Mosaic 1 -- so much so that it takes away most of my motivation for achieving Mosaic 2.

This select-Extra-Legroom-on-booking is live now and I was able to select such seats for flights I've booked (I'm Mosaic 1) in late Feb.