The problem with this generation coming through is the same as the previous.
The majority of the good individuals (that would be great managers) have no interest in being a part of management teams.
They just want to fly then go home. Some may like to be involved in check and training etc but, they want the best lives for their family and colleagues, for the least amount of work and stress.
Management positions often attract certain types Of individuals that tend to be incompatible with the wishes of the previous group. The next generation of "managers" won't be any different... Who do you think train's them...