Welcome from a fellow Georgian.
I prefer DL for a couple reasons
-I always use an UQ in cool weather, but in the spring/summer/fall when lows are above 70-75, I will put a Neat sheet between the layers to cut the breeze off my back instead of an UQ. Anything will work. I have access between the layers on all 4 corners. You could also just lay on top of one in a single layer.
-It seems to have less stretch than a single layer 1.7.
-I use a 3/4 UQ most of the time and my sit pad fits nicely between the layers as leg insulation without falling out when I shift a little.
-the mosquito thing isn't an issue for me b/c my bugnet surrounds my hammock and me. I can see how DL could help with that for a hammock with net on top only.
-One downside is sometimes, if I don't get in correctly, my layers shift a little. In other words, i could lay in the hammcok with an edge seam centered down my back it only took a night or two to learn how to avoid this. Mine is open with no attached bug net, so it may not be an issue with a WBBB.