why do we think he is not generous. Why should he be calm? Lets back his natural instincts. He cannot be like dravid or dhoni. Thats not his style or personality. His passion is reflected in his body language.
As long as he is not using foul language it is fine, else he should be aggressive. There have been lot of aggressive captains who are successful too like Imran Khan, Ricky Ponting, Gavaskar.
Lets let him be on his own. ONly suggestion which I want for him is to give honest feedback on performance during post match discussions. Lets be wary of the negatives. In last match giving around 70 runs in last 5 overs is unacceptable for any bowler. Hope this message is delivered.