I'm starting to wonder the same, the last five months worth of patreon posts have been nothing but monthly art, and I haven't seen anything about releases. I really hope I'm wrong though and that they're planning a major update.
i know making a game like this is hard, especially for indie devs, but i think give a head up every now and then won't hurt for them and let the community knows
No, it's not that hard, if others are capable to do more content a month then this team does a year. Fun fact, at the beginning this game was like that too, monthly updates with more content then we get in a year now.