Go back to season 1 Rosen, was the clubs lawyer, he is connected to the club on a personal level, he can help him out, also he still get to galindo and say that Jax setting them up with poorly made goods, they respected Clay more than Jax anyway, i still think Nero will hurt them also, nobody is this forgiving and okay with Jax calling the shots, the only person worse than him is Alvarez from the Mayans who let the samcro kill his son as payback for an attack on Clay.
In the show time line they have not seen rosen in like 4 years. I doubt they would bring him back now. Clay is damaged goods and the Cartel knows that the Irish are dead to them because of that attack and there racism(you forgot about the shoot out). Clay is prob not going anywhere but his way out will be more cleaver but for the most part he fukked and he has no moves to make. The Club was his family and they betrayed him.
Juice and Gemma did him dirty though I think he will go after them next season before he dies.
 altho they shouldve just let it rest after 5 seasons, I have a feeling last 2 are gonna be like

 to Jax for becoming clay and not listening to him, when the rico shyt that the club was in was due to bobby fukking Otto's old lady.  Clay gonna stick around til the final season... Final season will be Clay vs. Jax... its always been and always will be Clay vs. Jax.  The Irish still have revenge for the Sons this next season, who knows if the cartel will show their faces again, and Nero doesn't want out of the game now that he's back in.
 at clay having the 
 face while he was in the back of that patty wagon
 at Pope getting killed
 idk if jack can handle all this shyt. These next few season gonna be some shyt.

 Loser ass spigga and 