Now you're getting the way things work
People are saying he can do a shorter update every month, not the same amount of scenes in 1 month. Don't be dishonest, that just makes your argument look bad from the get go.
The answer is a bit of both: does he push quality out? Render-wise yes, storywise meh.
Does he push unnecessary renders? Yes. Some scenes have lets say 300 renders when they could have half of it and still be 99% as good as they were with the 150 extra.
Did he set patreon goals that he did not fulfill ? Yes.
Would those patreon goals, if he kept his promise, increase the speed of production of the game? Everything points to yes.
If he set himself to do only the scene creation (therefore not compromising quality of scenes and the so-called perfectionism that he has) and left the rendering/post processing to other peeps on his team, would the updates come out faster? Yes, by at least a month on each update.
Following this path, is he on track to push less and less updates each year? Oh yes, yes he is.
How long is the development on this is going to take if it keeps going like this? About 10 years or more.
Is he going to finish it? Based on other devs that have taken similar projects alone and his reluctancy to work with anyone, highly unlikely.
Does everything point to a scenario where it's more profitable for him to keep the ball rolling slowly? Yes, but kudos to him as long as people keep paying.