From a Sharif Atkins interview at the chicago tribune
It’s a good finale until the final minutes make it a great one.
The final scene is such a jaw-dropper that it seems unlikely that the series wouldn’t be renewed. Still, though, this is TV and it wouldn’t be smart to count on anything until the title sequence starts rolling on next season’s premiere.
“USA wanted it to not be (an) ambiguous (ending) at all,” Thiel [WC executive producer] said. “Originally, we left it ambiguous about what happens as far as whether it was the end or not the end and they didn’t want it to be that way.”
Atkins, who is well versed in the ups and downs of the Hollywood casting roller coaster, would, of course, like to see the show continue for “two of three more seasons,” he said with a laugh.
Then, pausing, he offered astutely: “I think you want to get one more season out of it to bring a proper close to the story that has been very well told and very well woven. It would do the show justice and the characters and the relationships … It would do everyone justice to really have an opportunity to finish the story out.”