For my part, I am willing to wait months and years if he has new ideas that he want to implement to make it a better chapter 13... all of that said I am not a subscriber and even if I was, I would know that his other subscriber will not have the same patience.
If he were to read this comments, I would suggest him that he needs to be realistic about what he can implement in his final version as he cannot go on forever. If he released the new version at the end of 2025, even if it's best the best conclusion in the history of mankind, people will be sour about the long delay.
So even if he has lots of ideas that would make it better, the best thing he could do is release a satisfaying version at the end of july even if he could make it stronger with more time. And if he wishes to improve it to do all of his ideas, he could come back later with more scenes. Of course it will not be as good as if he released at first but this cannot go on forever.
That said I am not complaining about the delay, I am not a paying customer and I am not entitled to even receive the beta or the final version in the first place. Technically, I should not even play it in the first place...
