First, those who go to ground for the Winter are missing some of the best most comfortable hanging time.... It is as easy to be warm in the air as on the ground, properly equiped.
Second Winter hanging gear is no heavier than equivelant ground gear (save perhaps the tarping minimalist. Most any camping hammock can be had for about 1.5 pounds including the rope or strap suspension, A tarp capable near full enclosure, nominally 11x10 is 18-19 oz the JRB four season set totals 71 oz including three stuff sacks and the Suspension System. Add 5 oz for guy lines and half dozen pegs and the total winter weight is 118 oz or 7.4 lbs for a winter set up that will be capable of 0-10 degrees given normal caviats of sheltered site, well fed , well hydrated etc.(A zero degree bag, ground cloth, adequate winter pad, and large tarp or solo tent complete with all lines and pegs will easily approximate this total weight). I could reduce this weight by about 16-20 oz with alternate quilt and cord/peg selections, more if i want to push the edge and count clothing in the sleep system... However,a 7.4 pound mark is a good start point for a full winter camp comparision...
Pads and the Weather Shield are not necessary to achieve these results....
Getting wet from the bottom is a non issue with an adequate tarp and a sheltered site...FWIW, The Weather Shield Type2 (WS2) was recently released and again sold out. They are expected back in stock 4 April.
I'm biased ... but these are simple facts.
Let the snow balls fly... :-)))