It's called the NavigationService. This one is designed specifically for navigating with Humanoids. It seems to function in mostly the same was as the old PathfindingService.

wiki.roblox.com/index.php?title=API:Class/NavigationService

wiki.roblox.com/index.php?title=API:Class/NavigationPath

wiki.roblox.com/index.php?title=API:Class/NavigationWaypoint

In addition to this, a new type of Constraint called the WeldConstraint will also be released soon. It functions similarly to a Weld, except you can set the CFrame of one Part and the other Part will keep the same offset to the first Part.

wiki.roblox.com/index.php?title=API:Class/WeldConstraint