The only potential advantage of this service vs the train is that train timetable release dates are severely limited at the moment (even now you can only book up until April and TPE who operate to Scarbados are changing timetables on the 29th)
When train timetables do come out there'll be a surge in demand and therefore price as we look to escape the 4 walls and get a change of scenery so a fixed price bus might appeal to some on a budget/wanting certainty of a service operating.
6 hours on an Omnidekka sounds about as appealing as a punch in the face from Mike Tyson though tbf.
RE: New service X11
Wistfully stuck in the 90s