Why was it called Philadelphia?
Aside from it taking play there I see zero connection. It begins with the Stringblown song and homeless folks waiving to the camera. WTF does that have to do with the movie? If any movie could make a claim on Philly it would be Rocky. How is a lawsuit over being unjustly fired a definitive Philly story? With that said I thought the film was well done in a way: great actors, good drama. However I didn't like the director's style in general: having everyone stare into the camera, overly sentimental, etc. They also needed to cut out the beginning wave footage, the opera scenes, the superfluous stuff, and change the title of course.
But this isn't the only film whose title I have an issue with: another is Munich (nothing to do with Munich aside from the first scene set there). By the way this one is a Spielberg ripoff of the far superior film Sword of Gideon.
Another is JFK. Nothing to do with JFK, it was all about Jim Garrison's wacked out conspiracy theories.