As someone with some experience here, there absolutely is, however it’s not quite that straightforward. The PA system overall would be tuned to the stadium, but getting the different mics to sound exactly like each other is difficult because of the variables between mic type, manufacturing, and just where the mic is in relation to the person speaking. Then you finally get to the question of “how does this specific person sound on a given mic, and is it good?” which itself is a bit more art than science.
It sounds like perhaps there is more adjusting that could be done for the host, and I’m sure they’ll do that. There’s never enough time given to do these sorts of things. Also, in my experience the overall tuning done on PA systems can tend to over-emphasize clarity, both to help the crowd understand and also to help fight feedback, but usually at the expense of generating a somewhat harsh sound. Again, I’m sure tweaking will happen.