Actually, when you swap to bane spider from crab, the pack doesnt shrink.It stays extended, but if you make yourself look like a crab spider with a crab pack before selecting crab specialization, it is compacted into a small pack actually until you choose your crab spider specialization. I wish they would fix it so when i swap to bane spider spec, my legs collapse and i can swap out the pack for a cape or something. just make it so that
pseudocode!
if (class_spec == "crab")
{
backitem = "Crab_Spider_Legs";
}
elseif (class_spec == "bane")
{
backitem = "Cape";
}
or something along those lines :P (pseudo code ftw!)