I tried similar with ACF only, but its native UI is to bulky for a good user experience when it comes to more than two columns and many elements within.
ACF support for Page Builder would be awesome. I’m following this thread for a while now hoping to get good news one day 🙂
Page Builders slim UI and the way it handles content editing makes it suitable for simple and complex layouts.
In a perfect world I see the Flexible Content Field improved to do just this natively.