What I would expect is that once given an assurance of survival for a longer period of time, people would become more sensitive to death and thus feel more mora

What I would expect is that once given an assurance of survival for a longer period of time, people would become more sensitive to death and thus feel more moral duty to bring cryonauts back and treat them with dignity. If nothing else, cryonicists certainly have motive to build a community which has these sorts of values.