But isn't that one of the problems with Voyager? The pilot set us up with two very different crews and suggested the real possibility of conflict within the crew, which would have been a good source of drama. Then, that potential was very rarely tapped.
I agree - the unity of the crew was one of the drawbacks of the show because we were told there would be strife and it was never delivered.
Also, I can't agree with the basic premise just based on the fact that the characters on Voyager were less interesting than the paper they were written on. That's not to say the TNG characters were rolling in depth, but even the actors from Voyager complain about how bland their characters were.