Uncharted 4: A Thief's End has only been available for a matter of days, but the game's already been updated a handful of times. Available right now is v1.03, which includes a slew of updates to the single player and multiplayer. The offline upgrades include a fix for campaign crashes and a solution to some particle sync issues.
The multiplayer tweaks, however, go much deeper, solving a whole slew of minor issues across all of the game's multiplayer modes. You can find the full list of patch notes through here, with Naughty Dog promising that it will continue working on the online component for the forseeable future. Is there anything that you think needs patching? Let us know.