When that guy in the video takes off the vest at the end you can see the shirt is ill-fitting in the same places as the V.1. If they had shortened the shoulder seams a bit and snugged it up in the under-the-shoulders area it would have made a world of difference. The underlying body proportions are good but the shirt is just too baggy in the torso and broad in the shoulders for it.
The V.2 in that video in throne room mode actually looks slightly wonky, mostly due to the legs looking like twigs from cutting the leg padding, even if the torso is slightly less bulky vs V.1 due to the new cut of the fatsuit.
I know he probably hasn't really futzed much but from the back (when he spins it) that fig in the vid looks kinda bad - too-skinny legs, bulky upper torso, seams drooping from the points of the shoulders, baggy arm sleeves.
Here's the v2 fatsuit:
And here's the v1 fatsuit (Timemeddler pic):
Lot slimmer obviously in places.
I don't have the v2 so I can't compare but I didn't think the "fat" Luke came out too bad... here's mine...