Customizing with a framework parent theme setup

I have a customer who saw a website she really liked and decided she wanted an identical look for her existing site. The site she admired features a WordPress framework with a parent theme on top. I humored her even though I’ve never used a framework — I’m usually a parent theme + child theme type of developer.

Now (of course!) the customer wants customizations to the design. I’m not sure how to proceed as I’ve read that a framework + parent theme + child theme (aka a grandchild theme) setup isn’t a great idea. Do I get rid of the framework, and create a child theme under the parent theme in my usual way? Or, do I keep the framework, remove the parent theme, and create my own clone theme with mods? Did we even need the framework at all in the first place?