Yea, the Fak brothers are a bit annoying and hard to imagine any $150+/plate restaurant would allow either of them to be front of the house.
There were a few episodes that seemed to drag on, but for the most part I also liked the change of pace in this season. There is only so much they can do with "the restaurant is on the edge of bankruptcy and going to close at any minute," before it gets old. Unfortunately, it looks like that's back where the show is headed next season.
I'm not sure where else they can bring in strife or adversity to make for an interesting show, but it would be nice if they could switch gears.