Take a look at this vid. This may have been the last mitt session he had w/ Dumbquiao leading up to the fight. As y'all can see, it just doesn't make sense with how Roach is trying to put together on how to deal with Juanita's counter-lead right.
Point #1 - Juanita uses the counter lead right when he's backin' up, not when he's coming forward. But, in the vid below, you see Roach trying to mimic Juanita, however, Roach is walking forward throwing the lead right. Complete opposite of what Juanita does.
Point #2 - Another counter Roach came up with, and this has been their drill for a longtime, is to sidestep to Dumbquiao's left whenever he sees the lead right coming, but, in reality, Juanita doesn't execute it like that, he usually steps to his left and then fires the lead right and Dumbquiao and Roach are so stupid, they don't even practice moving to the right to cut the ring off against the right-handed fighter.