So, I've contacted Darkglass support about the ratio and attack/release times. Here are the specs for anyone interested:
“Hello Brynar:
the specs i got for the Symmetry are:
Attack: 30 to 60mS
Release: 200 to 800ms
Type of circuit: VCA compression
Ratio at min : 1:1.5
Ratio at max : 1 :3.7...