When there is a whole mess of Countdown tiles on the board, it would be great if the ones that are down to “1” flashed more urgently so that the player knows that those are the ones to you need to PAY ATTENTION TO NOW.
This would especially help in PvE when you’re just trying to get through a clear and move on with your life and then you miss that Tommy Gun tile that wipes out your team because the board was covered with a ton of other countdowns. Not that this just happened to me or anything.
P.S. The Bejeweled games did this years ago