Nothing truly progressive. A few backstories to fill in the blanks but nothing no one was dying to discover. At its worst, extremely boring (Ice Chips) and/or filled with forced humor from the Flaks. If I were to ever give the series a complete rewatch in the future, I wouldn't feel any regret in skipping this season.
Dude it totally is skippable, feels like they had zero ideas for season 3, episode 1 was legit an artsy fartsy recap of everything from the previous seasons, episode 2 was one long conversation in the kitchen, then they made an entire episode showing us how Tina got her job at The Beef which did we really need to see that? as if we couldn't figure out Tina took a shitty job making sandwiches cause she needed a job? May as well give us an entire episode showing us how Marcus got his job there as well.
Honestly theres just no story in season 3, they clearly struggled to fill out this season and every episode shows it. And i think they think the Faks are way more funny than they actually are, i just find their scenes annoying but you can tell the writers think they're hilarious and fan favorites or something. And John Cena randomly showing up as a Fak was ridiculous, and felt like ok now we're just doing random cameos for the fuck of it, not for amazing acting or for the story.
Yeah the show is popular for its high intensity chaos in the kitchen and showing the inner struggles of it, yet we spend 90% of this season out of the kitchen and doing character study episodes and people talking about their feelings.
And yeah they made a big deal about wanting to get a star and we see no story progression on that or emphasis on it, every episode feels like some filler isolated episode that could be removed from the season and nothing would be lost to the story.