We’re planning that it’ll receive the same updates as the main game itself and all of the features (that work offline). Expansions to the game world might come at a small price so you can enter those, but other than those my current plan isn’t to restrict features, new skills or content additions to existing regions in any way in the offline version.

Also, offline version will include cloud saving so there’s no risk of losing your progress if the device is lost. It’ll cloud save when it has connection periodically while mostly keeping everything on a local save.