How about a 0-9s at least. A setting for ADSR like you have for key tracking with various options.
0-18s make the slider so sensitive that you can barely touch it in the most common ranges you use.
Within 1-2mm you use the most hard to get it right.
Or maybe a curve to it, when doing longer like over 10s it need not be so sensitive. Like you have for volume pots, kind of, a more logarithmic curve to it.
Thanks for any support....