Well, according to this post by a Dev,
There’s really only 3 people working the console ports. Meanwhile, if their staff page is correct, they have at least 50+ staff. So the majority are working on the PC version.
This also backs up my earlier point that they have been working on the xbox version most likely for months now. They currently have a working PS4 version according to that post, but again, it will probably be weeks/months before it’s released.