Any fight mayweather plays becomes really boring way too quickly. Even when he fought mcgregor a mma fighter the fight became really boring, mcgregor is a dude that is "entertainer" at heart instead of a real boxer, he is a great fighter but not a boxer, even with an "entertainer" somehow mayweather managed to make his fight boring.
Mayweather makes money, Mcgregor make fans! Their fight was most likely a paid event with more money paid to Gregor for losing. These fighters are never allowed to play at their own will.
Pac is great and all but I do not think people will flock to it like they did last time, people did not know mayweather very well until his name got big and when we saw the pac fight and mcgregor fight we realized he has a boring style, a great style to win maybe but sucks to watch.
It wouldn't suck to watch because the organisers will create the event in such a way that it raises the table of bets on every move, every minute and every round. So unpredictable, so interesting. In the end, the fixed match will be concluded with predefined results.