...THE TIME DISPLAY IS TOO SMALL! The time display is the only indicater of who's turn it is to move.
I do agree the clocks can and probably should be larger.
Note that it's not the "only" indicator of who's turn it is to move. You can also glance up at the notation window to see the last move, and thus know who's move it now is.
OH DIETY, PLEASE ALLOW A SOUND REMINDER AT TEN SECONDS LEFT!!!!!!11!!! sorry. I have lost so, so many games where I lose track and oops out of time. 
. If there was a sound which I could have invoke at a point I can set in my preferences (a subtle westminster "dong" would be my choice) the joy would be boundless in my home.
Thank you Mr. Ed Collins. I have nevr tried looking at the notation window to see who's move it is. That is a very helpfull suggestion. I have very low vision and I will do as you suggest the next time that my opponent is taking a very long time to move. Looking away from the board does cause one to stop analyzing the position. Until recently there were blue highlights on the last moved piece. I don't see them now. If they changed them to yellow or made them more subtle, I wouldn't know it because of my eyesight. But simply making the clocks MUCH BIGGER seems like a no-brainer to me.
This is very important to me and may be to many other players who have poor eyesight. THE TIME DISPLAY IS TOO SMALL! The time display is the only indicater of who's turn it is to move. I can't see it without getting my nose next to the screen and I have a BIG monitor. The server used to show a highlight of the last piece moved. This was very helpful to me and it is gone. Now the timer is the only indicater I have of who's turn it is to move. It would be much easier for me to play if the time indication was much larger in size and easier to see. Thank you for Chess.com.