Like so many things, furniture manufacturer's have found ways to cheapen microfiber fabrics so that what was once a durable, low risk fabric isn't always so any longer.
My guess is that you won't notice a problem when you clean it, but short of us having a conversation about it, here are a few things I'd suggest:
1. Even though most any dark fabric will crock colors when rubbed, the fact that there is unstable dye is worth noting, and be sure to note on your work order that the presence of unstable dyes means that some areas my appear to be lighter after you finish cleaning.
2. Sometimes these loose dyes will migrate and dry with "watermarks" in areas that dry slowly. This is most common when they spill something, but it could happen when you clean it. Precondition and rinse extract evenly, and use fans when you are done.
3. I don't know the pH of your upholstery cleaner, but a lot of guys get comfortable with fairly alkaline cleaners when cleaning microfiber. In this case, the fabric doesn't appear to be abusively soiled, so you might be able to reduce the crocking with a cleaner that is closer to neutral, and perhaps follow up with an acidic rinse. That is almost never done on microfiber fabric, but if you can get it clean with milder stuff, it might control the crocking.
4. Watch where you put any loose cushions. If they are crocking color and you lay them on carpet or other fabrics, that color could transfer to those surfaces.
5. Be careful if you need to do any spotting in once specific area. If color crocks evenly all over the piece, its almost never noticed. If it comes out in one spot, they will see it clearly.
6. Bottom Line: The problem is theirs until you make it yours.
I am getting some things ready for my presentations at MFE, but will be happy to talk to you if you need more help.
