In all fairness he did break his hand early. But the inactivity says it all. He has no interest in doing this any more.
It is good that he us back with coach Robles but he needs to be active. Chisora Dillian White D. Wilder Jared Anderson Pulev are names that make a lot of sense to get back in the mix. M. Charr, as a bounce back fight.
Ruiz had his time, he's done. If he'd stayed active after AJ 2 there were a load of big fights for him. Instead, he's fought once a year, and his profile dropped so much that he was basically fighter contender level again and not exactly doing great. At 35 I don't see him doing anything at all.