1. only leader can open war or he can choose if specific co-leader can or not.
My clan wars back to back. We are adults with jobs and lives outside of this game. The reason we have several co-leaders is so that if one of us isn't around when a war ends, another can get the search going right away. If the leader doesn't trust an individual to make smart decisions about starting wars, then he shouldn't promote that person to co-leader. Pretty simple.
2. leader can send as many mails as he like.
I would have no problem with this, but presumably SC has their reasons for limiting the ability to send clan mails.
3. leader can see who is active or not.
Active? You mean actively signed in to the game? This is a privacy issue; I see no reason why a leader would need or should have this ability. If I want to sign in to the game for a minute to check something without feeling the need to respond to questions or whatever, I should be able to do so.
Why does it bother you that "co-leaders" (think about that title for a minute) have the powers they do? If you are the leader of a clan and don't feel comfortable sharing power, don't create any co-leaders!

