Rank per se doesn't mean you get more previleges. I mean you can be an Oberleutnant, but you're not Staffelkapitän when there's a Hauptmann leading it
Responsibilities should depend on position - wingman, element leader, flight leader, squadron commander, Gruppenkommandeur, ...
However with virtually nothing known on the campaign I prefer to keep myself from dreaming. Not expecting anything cannot get you disappointed