well I personally think if your in the rain that turns to ice, all things are going to not work as well, from as simple as added weight to the arrow shaft, to well moving parts can freeze, so? not sure a drop away is any better than a fixed in freezing rain to ice??
same as in heavy snow
I have hunted over the yrs and had arows freeze to the rest in me, as well as the nick to the string?
weather can sure play a roll in archery gear I think
and lets not forget about mechanical heads, I am sure there very prone to possibly not opeing if they freeze as well so?? something to think about I guess in bad weather??