Assassin’s Creed Odyssey update 1.1.0 and 1.1.1 patch notes are now available for PS4, PC, and XBox One. According to the official patch notes, the latest update has added Mastery Levels System, additional fast travel points to Mythical Creatures, dismantle option at the Blacksmith, added support for DLC Episode 1 Hunted and much more.
Source: N4G PC Assassin's Creed Odyssey Update 1.1.0 and 1.1.1 Patch Notes