Hey!
New CC player and this is a really great and fun deal!
Being a NOOB! I will throw out an idea I am sure has been mentioned a million times before.
A player statistic that calculates the average time it takes you to take your turn.
Automatically -- As soon as its your turn and the email has been sent the timer starts and stops when you completed your turn.
Then you can easily identify players that are online all the time and do many turns ... and players who only log in once a day.
See you in the battles!