Bethesda rolled out the final Fallout 76 update for this year and the plans for 2019 on the same day, 19 December 2018. The update is just a hotfix, but the plans for 2019 should address some major issues, such as the utter lack of PvP.
Fallout 76 has proven to be a train filled to the brim with disasters for Bethesda, but post-launch support seems to be here to stay for the foreseeable future. A quick hotfix on 19 December 2019 addressed several bugs, such as an issue on PC that would cause the game to crash upon users clicking Exit to Desktop.
A bug that prevented high damage weapons from dealing any damage, or letting enemies heal up immediately any damage they received has been removed, along with an exploit that would allow players to duplicate items. There is no mention of a ban wave so anyone who may have used the exploit so far should be safe. There is also Korean localisation included in the patch.
That about sums up the interesting parts of the hotfix, but the plans for 2019 seem to be a bit more exciting. Bethesda didn't go too far into the future, promising the sun and stars to their players, but the updates scheduled for January are rather interesting.
Robot duplication on Whitespring will be dealt with and perk card issues should be fixed at about the same time. Lever-action rifle reload will be fixed in January too, which will mark the end of the dreaded bug that literally persisted for years, since Fallout 4.
Another highly anticipated change in 2019 will be the addition of a new mode, that will have no PvP restrictions. According to Bethesda's blog post, the mode is already deep into development and they are playing in the office, while it's expected to go live at some point during Q1 2019.
There is currently no other info about this PvP extravaganza, but Bethesda's wording is kind of odd. They specifically said "mode" and not "servers" so there may be more than just a regular Fallout 76 PvP experience in the works.