I'm not sure where your price point is going to be, nor where you would like it to be, but I think the game is worth $15-20. A price as high as this might make some potential buyers think twice before purchasing, but the ones that do put down their money will surely be happy with the game's quality. The fact that it is also in Early Access will also keep some customers away, as we have all been burned by a game we invested in being abandoned before completion.
I would advise you to think carefully about adjusting you Subscribestar terms, and I say this as one who is NOT one of your patrons. Even a $2 a month patron will send you $24 a year, and changing the terms at this point may alienate some of those folks that have been supporting the game to this point. Or maybe they'll see the logic in your decision and take it in stride, who knows?
Of course, I really have no idea how the economy of adult games work, so you should listen to the advice you get from other (successful) game devs more than you should listen to the words of a fanboy like me... I just want you to prosper enough from this game that you would be inclined to create another. You've made a fine game, one of the best that I've had the pleasure to play; I look forward to more.