Something that has been talked about in Star Citizen too, this multi crew feature will be the hype when its released but later down the road, it'll end up being a novelty, nothing more.
I mean seriously who wants to be playing with pips for their entire Elite Dangerous career. 1 pilot can still do a reasonable good job moreover AI is still competent plus should there be the option for NPC crew like Star Citizen(FD will most likely implement NPC crew much later on, empty seats on a multi crew corvette is quite a concept), human crew will be obsolete.
Now ship launched fighters on the other hand will complement multi crew a lot and it will end up being the only logical reason people multi crew in the long run in Elite Dangerous.
I know that there are people who like to be gun on the ground, they do not want to be pilots. when we get the FPS i guess, depending on game play, that some people would like to be marines only.
we see that in ArmA and even in SC.