Timer reminders

I was thinking, as I practice more and more complicated war attacks, that I really appreciate that the timer starts to flash red with 30 seconds left. However, it doesn't usually leave enough time to change an outcome not already decided by that point.
I would love to have more timer reminders, especially audio cues (a chime, whistle, or anything distinctive) that could clue me in that two minutes remain, one remains, etc. Trying to perfectly execute an attack requires a lot of concentration, and I believe it would be much easier to hear a sound and know exactly where you are on the timer without having to take your eyes off of the battle and deployment bar.