[Roman_V_M]

As a web developer I initially liked this Flask-like decorator syntax of xbmcswift but now based on my experience I can tell you that the less abstractions you have the better your code is. Abstractions are too brittle and in case of third-party dependencies there's always a chance that the library you are using will be abandoned because its developer's interests changed.
So I'd recommend to stick to raw Kodi Python API as much as possible.