They had a roadmap in '17 that they've mostly finished, not sure if they've provided another recently, besides that they regularly do Patreon surveys where donors vote on what content they should work on next.
As for if the game will ever truly be finished; only if they get sick of the game or the money dries up, and neither seem likely any time soon.
As for if the game will ever truly be finished; only if they get sick of the game or the money dries up, and neither seem likely any time soon.