introduces two new miscreants to your roster, the Man-At-Arms and the Arbalest. The former is a melee specialist, while the latter adopts my favourite approach, namely hiding at the back shooting unspeakable abominations while they're distractededly chewing on the front-liners.
Three new bosses will also make their debut, the Gibbering Prophet, Formless Flesh, and the Brigand Cannon. These can be found in the Ruins, Warrens and Weald dungeons respectively. The Ancestor’s Trinket set is an ultra-rare item set "only found in the pitch dark", while the new Ancestor’s Statue structure lets you replay cutscenes and boss backstories.
As if it wasn't enough to simply go mad and get riddled with syphilis, your plucky band of anti-heroes will now suffer heart attacks if their Stress bar fills twice. On the plus side you can now critically hit when you heal, restoring a bonus amount of damage.
There's a tonne of other changes, which you can peruse in the full. Incidentally, if the brutal world of Darkest Dungeon has been sapping your sanity as much as it has your troops', you can find a lot of information, hints and tips in a new that developer Red Hook Studios has set up.