Fields also addressed these rumors, but he wasn’t able to provide much information that the fans didn’t already have. He claimed that the future of the show is still under question and he himself was apparently not very certain what’s coming, but he also sounded hopeful that the network will see the potential of the production and keep it around for longer.
For what it’s worth, FX have actually given Fields and his team a lot of freedom in developing the show to their own taste, which implies that they also have a lot of trust in the production right now.
With that in mind, it’s probably reasonable to expect that the network would want to keep the show around for the moment, and considering that Fields also talked about seasons 5 and 6 (although in a very vague manner), things are definitely looking good on that front. Of course, what he says and what ends up happening could be very different in reality.
The showrunner specifically said that they will “do what’s right for storytelling” for the next seasons of the show, although this of course doesn’t really give any specific information to fans. The definition of “what’s right” can change a lot as the series progresses, and we guess that any hints about seasons 5 and 6 should be sought in the developments that will occur in the upcoming season 4 for the most part.