One feature I really miss with Skybox is the ability to set the 'depth' of subtitles while playing a 3d-movie. The subtitles appear 'flat' on the screen and interfere with all effects that are closer to the viewer than the 'screen plane'.
i.e. with Kodi there is an option of 'pull' the subtitles-layer a bit closer so they don't 'disturb' the actual movie-3d-effects.