I personally think BF definitely promotes characters to camp more, but because of the unnecessarily difficult platform physics in ultimate being on a platform is painful especially during disadvantage state.
Another problem is that sometimes I feel like teching onto a platform on a BF stage to get out of disadvantage state can feel like it's a worse option than just neutral air dodging to get back to the ground.
However, I do think battlefield is really good for some characters, especially swordies who can shark through them and characters that rely on platform resets to extend their combos (i.e. my main, Meta Knight or even Mario) which is why I often find myself counter picking BF in tournament sets for certain matchups.
For the most part though Battlefield isn't so bad once you practice platform techs such a circle dropping, wavelanding, etc etc