From what I've seen, development goes through different, long-lasting phases.
Inno prefers to finish off areas before moving on and that means being stuck in one particular place for several years - a portion of that time is dedicated to progressing the story and then another (perhaps the biggest) chunk used to fill it the area with side-content. This coincides with the timeline of the game - the early game felt like a story-oriented rpg and eventually turned into a sandbox experience when development shifted focus.
We're once again in the phase of extending the story, which should be followed by another long period of side-content being added... assuming history repeats itself and Inno's motivation and interest doesn't run out. There's a chance she may go back and revamp or fill in areas that need it but do keep in mind we're talking about a timespan of literal years. There's an equal chance that things will never go back to what they once were, in which case you're probably better off only checking this game once a year or scratch it off your list of interests.
One could argue that the success of the project has become its own prison. 7k a month is nothing to sneeze at and she gets it regardless of her shortcomings and excuses. What incentive does she have to change, really? If the issue here is her mental health and exhaustion, then she is screwed. She's her own boss - when and how much she works is up to her. There are few jobs out there that offer the same flexibility, benefit and compensation as this. If she's struggling with her own project, with all these advantages, then it's safe to assume she wouldn't last long in an ordinary job unless she's one of those people that perform better under pressure, with supervision and real consequences for failure.
This game has become her lifeline to put food in the table and pay the bills. It's draining every ounce of her will but she cannot let it go because the alternative is scarier. Better pay doesn't always mean better conditions and a happier disposition, it just means it will be harder to let go when shit hits the fan... which it did and still does. And she can't delegate tasks to an official team because then she'd lose agency and ownership over the game and its content. There were projects in the past that got ruined because of disagreements in the dev team.
