i think, rather than this, they just add a proper tutorial to game, would be easy enough to add any map and explain this in detail. a Questionaire would just lead to more of them quitting the game, as some people who failed it multiple times would just nah this games crap and stop playing.
Best way really i see, is the easy difficulty of solo play, is unlocked from the start and this is the only thing you can do. Complete the map 3 times and you've unlocked it for multiplayer. Very little changes needed to be made for this to happen in game, no extra content being added.