I would like to see a column on the main page for how much time I have left while it is my opponent's turn. This would be really helpful in a game timed with a Fischer clock or a game without vacations allowed.

I think just to the right of the "Time Left" column would be a good place for it. It could be headed with "Your Time Left" or something similar. For the standard move time limit, the column would just have the time per move in it. The colored dots would would still be there to help you know what's going on without having to visit each game to check. This would be really helpful for planning on leaving for the weekend or a business trip.