Boromir was a complicated character... like Denethor, Saruman, Theoden, Gollum... it's the more complex characters that really make a story... especiallly one like this. it's great to sit back and enjoy legolas do his elven hero thing but Boromir represents HUMANITY in general in this story... in many ways he's one of the most important characters in the books and the films.
If Boromir is overlooked, so id the point of the story...