I agree changes can, and should, be made when the material is outdated or doesn't work in the different medium.

At the same time, I want a certain fealty to the core of the character and what works.

The only thing that really bugs me about all the Batman movies, including Nolan's (but not enough to not enjoy the films), is that they over-armor Batman with bulky armored and/or plastic looking costumes. I'd rather once they use a suit that looks more traditional (sort of like what they designed for the "Dead End" fan film).

Batman isn't Iron Man.

Also, saying "if you want a comic, buy the freaking comic" is good advice...except when the movie or TV show hits big and DC decides to change the comic book to capitalize on the movie or TV show (case in point: Superman and Smallville) (though, after "Batman RIP", changing the comic books to be more like the movies might be a godsend).

Overall, however, I agree with BSAMS, et al. It's unrealistic to expect (at least in a live action film) a movie that is 100% like any comic book (or book, or any other source material).