Whether anything "real" will change or not remains to be seen. All that has actually happened at this point is that the park has been taken off of a list that the UN keeps. The actual operation of the park to the UN standards has always been voluntary. That is, our asking that the park be put on the list did not legally obligate us to do anything different than we were already doing.

So, at this point, it is a great, big nothing. No change to anything at all, except for the list that the UN keeps.

The worry, of course, is that having taken the park off of the UN list, the Park Service could now change the way the park and its environment are managed. If they did that before, they risked the UN publicly telling the world that we were no longer maintaining the park to their standards, and so were no longer entitled to be on the list.

Is that a serious worry? I don't honestly think so, but who knows? Only time will tell.