If all the Ali Act called for was an objective 3rd party rating system, then yes, that's all that would change. It would seem that you're ignoring the majority of the Act if you that's all it entails, though. There are any number of things under the Act that could cause significant change withing MMA if such an act were applied to the sport. Not the least of which would be that the revenues of the promotion for any given event must be made available to the fighters and their management so as to ensure an equal footing in negotiation (I'd suggest that this would cause huge change). Of course, one of the biggest problems with the Ali Act in boxing is that it is often not stringently applied and some even dismiss it as largely ineffective. Just if anyone's interested, there are lawsuits underway right now that claim some of Al Haymon's business practices, especially the ones related to PBC (and there are some clear parallels between the UFC and Haymon's PBC enterprise), are in violation of the Act.