Haven't seen it yet, will have to wait until I'm "State-side" but from reading your comments here, perhaps the idea is to separate themselves from the other shows of this genre ie: the Simpsons and Family Guy (which I've seen it compared to in it's promotion)
Family Guy, while more 'ribald' than the Simpsons, occasionally still gets compared to it's progenitor ("Simpsons did it") South Park even had a couple episodes making fun of that fact (The South Park guys are not big fans of Family Guy).
Because they're on Netflix, they're allowed the ability to go blue....growing up in the '70's myself, I had been in situations where swearing was just a part of the conversation....also the case in the UK, no particular emphasis on the shock of the use of certain words, just a part of the discourse and part of the language. Maybe that's why I've never been that 'shocked' when certain words are used.
In My opinion, it's never the words themselves that are the problem, but the hate, anger or evil of the intent behind them (for instance, I've never been particularly insulted when someone innocently refers to me as "Oriental" instead of "Asian"...if they meant it as an insult however....)
Language is communication, sometimes certain words are used for emphasis, or in particular situations among friends. When you begin banning certain words, then other words become ripe for banning if some particular group decides to take offense, then others then so on then so on. Then it becomes a situation you are looking for how to relate your opinions without 'hurting' other's feelings. Then true communication is stunted. ..If you use that word in a hateful or insulting manner, then that's another story.
Without having seen one episode, I would say FiFF is trying to find it's identity as well as separate itself from it's peers. I don't think Bill Burr has ever worried about what other's think of his language or humour, yet he's built a very good career for himself.
My 2 cents