I decided I needed to get this working so I wrote a plugin to get the ball rolling.
https://gist.github.com/fabrizim/9c0f36365f20705f7f73
This plugin alters the storage of values for widgets to be more in line with how widget settings are natively stored. This allows for the customizer to work with ACF fields.
I’m still testing, but it seems to be working. Elliot- let me know if you have a chance to review and if you think this approach will work.
