My thoughts.
If you are going to have a special turreted weapon view for use with multi-crew please open that up to single pilots to use to. This gives solo players the chance to use this in situations it might be useful but still provides an advantage to multi-crew players.
I'm not comfortable with extra pips for extra players, some sort of other power management mechanic to help balance between weapons perhaps?
Instant join/leave for multi-crew. I think allowing joining while docked is sensible, restricting things a bit. Leaving at any time makes sense, gameplay wise if not thematically. For people who want to explore together from one ship perhaps some sort of binding mechanic so that you can bind to someone you joined earlier and return to them when they are next on-line. This means the explorer wouldn't have to return to get someone every time but also you can't just show up on the other side of the galaxy without having travelled there (or at least waiting for your bound pilot to arrive). You would only be able to have one remote binding at a time.
Duplicated bounty sharing etc seems to extreme. Sharing seems more reasonable, even if that bumps the total amount a bit. Better still, ability to negotiate a percentage
I'd really
really like to see the ability to use hired crew to fill the multi-crew role.
If we can hire pilots with ships for wings that would be lovely too please.
More roles for crew to fulfil would be nice at somepoint..