The before landing part of the movie itself is so boring and uneventful that authors decided to cut it into pieces and shuffle them into hard-to-follow non-linear mess, which forces you to pay at least some attention to all those things not happening there. It is hard to imagine that flight to Jupiter will be that boring - there might be flybys, awesome views of Jupiter approaching, there might be interesting problems to be solved, there might be interesting scientific sub-missions to be worked on during flight and the crew should be a group of interesting people who discuss interesting things on the long journey.
