Mirrorlessons has a detailed analysis of everything ACROS has to offer and how it compares to Fuji’s original monochrome simulation. The author covers the built-in color filters, and when it is best to utilize them. He also provides many landscape, and portrait examples, with each simulated color filter in action so you can decide what you prefer.
I have not had time to dig deeply into tweaking ACROS yet, but it’s definitely improved my understanding of the film simulation. The author does a good job of explaining his perspective, and I agree with him when he makes definitive statements like preferring weak grain over strong grain due to it’s more organic look. This article is not to be missed if you are an ACROS fan.