I'm going to go in and update my graphic, but looking at the cancun radar, and having looked about about 100 consectutive graphics of it, I'd have to say that it almost looks like the "developing" COC is actually the previous eyewall. Although not a strong (green with smatterings of yellow in what used to show yellow/red), it certainly held together as a cohesive, distinct area far beyond what it should have.

The 70nm eye was the outer wind maxima that held constant during the past 36+ hours or so.

I'll update my graphic and then we can see if we're both describing the same thing.