The adjusted outline is 23 acts (aka chapters) and the game is currently at 19 acts. So I'd hazard to say the story is 4 acts from the end given the current planning. That's what I mean by "close" when I say it's close to the end.
However, if I feel like the game is rushing to the end or I'm cutting corners to stick with the outline then I will 100% add more acts. After all, the original outline was only 10 acts with 4 exclusive minor acts for climax and wrap-up. So you can see that I am not scared to scribble in the margins.
Because a good story without a satisfying conclusion is not a good story.
Yeah, as a fellow creative person, I'd say don't close yourself off into a specific number of chapters, if you can help it (of course if you're forced to by outside issues that's another matter entirely). It's fairly common for any writer to sunddenly feel like "ho wait, I could add that at this point..." and then it ripples into three more chapters.
Just keep the story going at the pace you feel it has to go instead of trying to get it done by act X. That way not only will you get a satisfying ending, but you'll also avoid the rush feeling as well as forgetting loose ends. You write it, you get to dictacte how many acts are enough, not any other factor.
And as we creative people are endlessly dissatisfied with our own works, if you try to make it fit into 23 acts, you'll likely end up kicking yourself anyway because you'll feel like you could have done far better.