I think that there may be good reason to be critical of the "Mexican Cartel" involvement theory. Not only because of the infinitesimal Hispanic population, but also the rather slim evidence on which it is based. Apparently LE found some grows with "camps" that had been vacated and the Mexican tie-in had to do with the kind of food traces/brands that they found. While that may point to someone who is Mexican, the "cartel" connection is kinda weak. Not ready to totally discard it, just critical.
I have seen suggestions, such as yours, of a pipeline to Kentucky. I have also seen mention of connections to Detroit. While both of these make sense to me, they overlook a critical piece and that is, who is actually distributing/selling the product? I would be very surprised if these folks have the "boots on the ground" in any of these areas. I would think that they may transport (or not) to a population center in bulk, where it is broken down and actually sold "on the street," as it were. So that represents to me a missing piece.
I am also intrigued by the recent package intercepted at the PO. Weed from California--apparently to be processed in Ohio into hash oil (shatter). This suggests another entity of some sort--which could be a Mexican connection--or not.
Lotta missing pieces as well as different ways to piece together the parts that we know.
JMO