Currently, the form component add some strong requirements on the way to access field values. It would be a good idea to allow to specify a different getter or setter (defaulting to the current behavior) to give more flexibility.

And for collections, it would be a good idea to be able to use addXXX and removeXXX instead of recreating the collection entirely using a setXXXs setter, which has really bad performances for Doctrine toMany relations as it removes all relations and add new ones.