Navi are actually just using the league as a way to try out new copositions/roles because they know they will make it to masters anyway. They are saving their real strats/comps for Tokyo.
I don't think they are saving strats. It feels like they want to be flexible and prepare different comps for each team and map in order to be unpredictable
They are not saving strats dont pull that bullshit excuse. simply they like to test different comps most of the time this always been NAVI or(FPX) Filosophy on the game since their team formed.