Recently (last weekend), I had 5 inches (when stretched) cut off my hair, to make it easier to manage. From my initial results (it will be another week probably at least until I figure out the best styling routine etc) my hair is so much less wavy.
That was before the cut
That was after
It will probably get a bit wavier than this, but probably not as wavy as before. I think I need the length for the waves to fully show, which some wavies seem to find. I kind off like the softer, gentler look, although I do miss my tighter waves.
I also have 2c curls in the front section of my hair. They are still curlier than the rest of my hair, but not as curly as they were before.
Looking at your shorter sections will probably help, bearing in mind different curl patterns on different areas on your head, how short you want to go, and hopefully your cut will go well!!
If you are not sure about how much length you want off and are unsure of the stylist, you can always go half way between the length you want ultimately and your current length. This means that if your hair is not as wavy or you don't like the length, you can choose to grow it out and it won't take as long. If your hair is fine, you can always go back next time and get it cut to the length you ultimately want