I'd disagree that nothing has changed. Consciousness of the fact that mass surveillance is happening is much more widespread, and gets brought up in passing from time to time. People have changed their behaviour somewhat - eg many now try to use encrypted communications quite consciously and even Signal has become quite popular for example. It's influence thinking over e.g. use of facial recognition cameras in public places which is unpopular.

And whilst what eg GCHQ actually do hasn't really changed much as far as I can tell, it's been brought onto an "open" legal footing which is progress. The next step will be for the legal safeguards which are currently rather toothless to evolve to have real teeth. I think that will happen eventually but it'll be a slow journey to get there.