I suggest adding the attendance rate next to user's name to see how often the person take there turn. While finding games you may rather join people with 100% attendance than people who have 85%.
Example: "Name" "Rate" "O"
In the "O" it would be coloured according to your attendance rate.
White: 100% (People who don't miss turns =D)
Green: 90-99% (Don't worry I'm sure people still play with you like the same)
Yellow: 80-89%
Red: 70-79%
Black: below 69
New Recruits won't have the "O" until next rank.