In our current campaign, see
>>47181908, two of us have actually reached the title of master. Which actually opens up the story potential quite a bit since you're recognized enough to get called out to certain places by the league administration for jobs only masters can take on. It also gives you access to certain places in the world that they only let masters into because of the danger, sort of like Cerulean Cave in Kanto but many of the locations we use are homebrew.