That's what a lot of people want to complain about, but no one really has a solution. We are in the course of developing players, but as Tippett has said, the NHL is not for development.
Unfortunately, we are stuck in the gray area of having a few players who could go to the AHL to develop, but we typically find ourselves bringing them right back up after the latest injury. Players like Crouse or Chychrun don't have the luxury of playing in the AHL, but they are thinking and playing the game at a level above that of the OHL.
Personally, I also think that we are at a crossroads on the leadership standpoint. Doan can't always be that guy in the room. OEL is kind of the next man up for the captaincy/leadership, but then who is next? Hanzal? Domi? McGinn? Smith? Our playoff years, we had Whitney, Langkow, Aucoin - those veterans could say something meaningful, but I am not certain that we have that yet. Could be b/c there are so many young players, and it will take another year or two before they fully get what a leader may be trying to convey to them.
I think that doing what we are doing right now is fine. Maybe there are players that we could squeeze more minutes out of, but there is a fine balance of putting players in a situation that they are trusted in. You gain trust by competing hard in practice and showing that you know what you are doing. Once you know what you are supposed to do, the execution of that plan at an individual and team level has to happen. If anything, we find out who has the moxie to execute in various situations.