I think as a pure glue resorcinol is still the best. It might kill you and it has no gap-filling ability and everything has to be heavily clamped -but it is still a great glue and was available in WW2. It is still the preferred bonding agent for brake shoes and plywoods, and if I was building a mast
from timber (why would one these days?) I would certainly prefer it because of its resistance to softening with heat. (Hence its use for brake linings).
Getting back to the question. I always use epoxy glass on the wetted side of any timber for its sealing and anti-checking ability and yes, it does help with abrasion resistance. It also adds quite a bit of strength but that is not the main reason for using it--it just makes a better seal and a better surface. It also adds to the weight, so if you are racing
your craft it may be better to use something else, or even nothing at all.
Many years ago we used Dynel--but glass is OK just a bit heavier. Epoxy is wonderful stuff--but although not as toxic as the glue it replaced--it is still dangerous stuff. My $0.02 worth.