Another gripe I have is Picard's backstory is never explained. If you didn't watch BoBW and Family Picard makes no sense. FC was a good crossover movie due to the zombie-like Borg, but for a casual viewer I don't think the dream-within-a-dream sequence is quite adequate.
Like when he says "I can hear them". Why can he hear them ? How?
Maybe, but I would have thought there were enough clues. The opening pull-back, Picard's dream, the talk with Riker - Starfleet thinks Picard having been assimilated makes him a risk - and it's later spelled out to Lilly even more overtly, and the final confrontation with the Borg Queen makes it obvious if you've not picked up on it already. If you still don't get it, go watch a different movie.

Obviously with these films they are going to assume a certain familiarity, but they can't really make it any more obvious without breaking the flow of the movie and inserting a scene early on where a character recounts the events of BoBW.
Of course, they then could have had a scene talking about I, Borg, in which Picard passes up a perfect chance for revenge because he's moved past such things.
*Smashes glass display case*