As mentioned, corpse horror was reworked a bit so there is now a differentiation between corpses of friends and corpses of enemies, and corpse bit horror has been toned down a lot. Caravans can now pass by half goblin teeth most of the time, and sometimes even the occasional goblin corpse without scuttling. Corpse hauling still stacks horribly, though, and I don't think rain and its recurring flashbacks has been adjusted.
In a rare case of providing an estimate, Toady said he wanted the Premium release out before the end of the year (and I think the contract deadline is somewhere around February, at the two year mark of the contract, so there's a fair bit less than a year to get it out). There's probably more than a year before the post Premium fallout cleanup is done, though.
While I've seen socializing clumping together and a larger number of passing acquaintances, I haven't seen any significant improvement in the friend making department, nor in the "be with friends/family" fulfillment one. They still seem (mostly?) unable to seek out those they need to spend time with (let alone create the relations required for the associated need), just as they often seem to complain about not being able to pray despite there being a temple available and they've had no job for months explicitly to give them time to catch up on needs (which gets especially bad when they're stressed, as half their actions then become yelling/crying at a consoler, with the other half typically hauling hoarded socks rather than need fulfillment). Once they start to get stressed, the stress level seems to continue to rise for no visible reason even if you take actions to try to fulfill needs and remove stressing activities. If these measures are taken immediately they can sometimes save the dorf, but wait a month and you've probably lost it.