Suggestion Idea:
I would suggest that the number of missed turns (speed and casual) and the number of times a player is kicked from a game for missing turns be tracked and displayed.
Specifics:
Capture the number of turns a player misses and the number of times a player is kicked for missing turns and display it either on the player summary or inline:
Player1 (15-2 17/5) simple count
Player1 (15-2 15%/5%) as percentage
My preference would be a percentage model, where it would be obvious at a glance that a particular player skipped x% of his turns and had been kicked from y% of his games.
Why it is needed:
Missed turns (for whatever reason) are annoying and time consuming, dragging the gameplay down for everyone. Players who abandon a game add a change in game dynamics to the problem.
We should be able to more easily identify players who do this and choose not to play with them.