This problem is symptomatic of underconfident Captains. New captains will be for a short time feel slightly uneasy in their new position and will be aware how much they have to lose if they get it wrong. Therefore they will quite rightly be a little more controlling. However as they feel more comfortable they will release their grip. The problem is with the longer term Captains who never seem to gain reasonable confidence and basically use f/os as an autopilot.