So they're done?
I know they're probably not, but I recall an interview at the outset of season 2 where they envisioned a 5-season story
And THIS story seems pretty much done. Johnny's ready to be a proper father, he's reconciled with his son and gotten his step-son to do so as well.
Daniel's got his family back on his side and has reconciled with Chozen and Barnes
They beat Silver.
Kreese is free, but he's a fugitive (it's a crime to beat up guards and escape even if you were wrongly convicted) and, more importantly, he's been disavowed by Johnny, his surrogate son, and has cut loose Tory, his surrogate granddaughter.
I'd hate to see them have to undo any or all of that just to squeeze out more seasons