I knit my first gansey from "Lion Brand Fisherman's Wool" some 3 years ago. It is an extrodinary garment knit from an extrodinary yarn.
However, Lion Brand has changed its sourcing of Fisherman's Wool. It is now a different fiber, a different spin, and a different ply. It is not the same. I bought a bit of the stuff, and will knit and test.
It really does feel nice while being knit, and looks nice right after being knit, that is it is easy to knit consistently and uniformly. There does not seem to be any veggy material in it, however there were a fair number of breaks in the yarn.
It felt wonderful while I knit it. As knit, the fabric felt wonderful. However, it lost stitch difinition while being blocked. The fabric lost elastisity and resiliance while being blocked. I would not use it for any garment that might get wet. I would certainly not use it for a gansey, and I would certainly not use it for anything a fisherman might wear.