Maybe the world clock could be configurable to your own city selections and have a default name of World Clock or your own name of xxxxx Clock.
This would allow you to do your own country clock if you are not a global company. You could add your own cities of places where you deal with people that have different time zone to your own.
Not a biggy and not sure of the effort needed, but just thinking of the little things that would be helpful in my mind.