While the API for xbmcswift2 is very similar to xbmcswift, there are a few backwards incompatible changes. The following list highlights the biggest changes:
Update all imports to use xbmcswift2 instead of xbmcswift. This includes the dependency in your addon.xml file.
In list item dictionaries, the url keyword has been changed to path.
In xbmcswift views, the proper way to return from a view was return plugin.add_items(items). In xbmcswift2 you can either return plugin.finish(items) or more simply return items.
# xbmcswift return plugin.add_items(items) # xbmcswift2 return plugin.finish(items) # (or) return items
In the past, the plugin.route() decorator accepted arbitrary keyword arguments in the call to be used as defaults. These args must now be a single dictionary for the keyword arg options.
# xbmcswift
plugin.route('/', page='1')
# xbmcswift2
plugin.route('/', options={'page': '1'})