I would LOVE an option to allow the "Minimum duration to display tenths of seconds" to scale with your current haste. In other words, if I set that value to 1.5 sec (to imitate GCD), it would dynamically change it to whatever my current GCD is, down to a minimum of 0.75 sec where the GCD caps. This would allow the player to more accurately judge whether they have time to cast one more GCD before their CDs finish, and the "tenths of seconds" display is a useful tool for this.

My Demon Hunter's haste is highly volatile, and jumps anywhere from 11% (with no buffs) to over 130% (with Metamorphosis, Heroism, Galecaller's Boon, Quick Navigation, and Overwhelming Power procs), and it can be tricky to guage whether I have time to cast one more Demon's Bite before my Blade Dance comes off CD. If "tenths of seconds" were to only show up for the last GCD-length window of a CD, it would be a powerful tool for any character whose haste jumps around a lot, especially when it could mean the difference between getting off 2 GCDs in a 1.5-sec window.