I think multicrew is a great idea and can imagine that it's great fun whenever I manage to get a crew together. Problem is, if "Wings" (also a great mechanic in principle!) is any indication, I won't be able to participate in multicrew gameplay very often, simply because it's so difficult to get a group together.
Just meeting one other random CMDR, much less 3 other CMDR in the huge galaxy game world is rare, but convincing all of them to spontaneously to stop what they are doing in order to join my play session proved already very difficult in "Wings".
What may make it even more difficult to convince such commanders to join me is that in contrast to "Wings" they'd need to abandon their ships to get on board of mine, and we supposedly couldn't even form the crew in space, but would have to meet up at a space station where everyone can switch over to my ship.
I'd love to play in a multicrew, but given the preparations required to make it happen I'd wish we had the alternative of NPC crewmembers just to be able to take better advantage of this great feature!
Unless FD implements some kind of "Wing Finder" or "Crew Finder" (akin to the "Dungeon Finder" in WoW) where you can sign up (perhaps for a specific role) and get automatically grouped with like-minded players. You'd still have to meet up somewhere, but at least the hassle of finding potential wing/crew members would be gone.
Funny thing, raids in MMOs tend to take a group of people to complete them, and you can find random people grouping up to do them as well as finding preset groups to do them. Some of those games have an ingame function for that purpose, some don't, but that doesn't stop people from getting together and doing the raids. Elite's own forums have that happening already, always has, guessing you missed those areas, as did so many others here? People who actually want the social interaction generally don't have a problem seeking out ways to make it happen, it's a known thing, been happening since the days of BBSs so long ago with MUDs and all that.
You want to find crew, use the board, I would wager there's a lot of RP oriented folks who'll love multicrew, that was the majority of the base who screamed for it in STO at any rate, they tend to love being an engineer or gunner or whatever instead of the captain all the time. I'll gun for a better pilot without a second thought, I may learn something you know, wouldn't be the first time for me, so definitely something I'd do. And I've got a friend ingame already who I plan on scaring the hell out of when we get multicrew, teach him to make fun of my smacking Pythons into planets, I'm in my Annie now!
Zeta Legion, you have no clue if a FDL can dogfight as well with a single player as it can with a crew, none of us does at this time. FD has stated that it will make the ship perform better with crew, no details on how that works, but I personally figure it's the main basics of humans being better, generally, than the computer at dealing the situation in real time as it happens. Gunners able to hold a target at range better for instance. Gimballed weapons walk all over, turrets are worse, but if they are rock steady when a human is the gunner's control seat, then they are immediately more effective, especially if that human can put them on target. You can tell me how great any single ship is right now with a single player, but we don't know what multicrew will do to alter that. I'm in an Annie, min crew of 40, 72 optimal, and I'm flying her solo, there's no way in hell I can be doing her justice, it's just not possible. Star Citizen addressed this with it's ships, since some of them take up to 30+ players. Anyone can fly them solo and get full functionality out of them, but that 1 person will be doing so with far less effectiveness than with crew. Full crew means better effectiveness, which gives that ship an actual advantage over a solo player, which what they want to have happen, it gives people are reason to be social, you can kick more ass together than you can alone. That tends to motivate people better than pushing the socialization side, because kicking ass usually means winning, and that is something people will work together for.
Elite Dangerous IS an MMO, it's marketed as one, it's marketed as THE multiplayer experience no less, so they really do need to do something to make that advert at least somewhat true, and this is a step in that direction. Folks can whine about solo and how making more multiplayer doesn't directly benefit them all they want, it doesn't hurt them either and it IS for the betterment of the game overall. You play solo, then you are in no way impacted by the multicrew, it can't be used against you, you'll never face it, and you don't need it and obviously don't want it, you are in solo mode after all, the entirely non-social aspect of this online multiplayer game.