I think the issue with releasing content like this is that folks who pay (and those who do not, but feel a sense of self-righteousness), feel like they have some kind of ownership and feel cheated, or disrespected (somehow) when their sense of time, or timeline has been violated. This couple is producing one of the best games on this entire site and in the entire genre. The reason why this game is so good, is because this couple takes forever to develop their content and makes damn sure they only present what they feel is the best representation of their art.
The band Tool has been around since 1990 and they have only released 5 albums. Now regardless of what you think of the band, you cannot fault them for not wanting to produce the best possible piece of art that they feel best represents their talent and message as a band. Other artist release music like magazine subscriptions and it's mostly mediocre. This game has yet to be mediocre and this story seems like it is going to be long and detailed. Give them the license to take as much time as they'd like and support their beautifully crafted game. Don't rush them, or force them into the trap of producing dog shit, because you think their timeline should match yours. This is their hobby, not their career. Even if this is their full time gig, art has no timeline.