I’m interested in using ACF on a large website project and it is very important that ACF be WCAG compliant on the front end. (I’m not concerned about color choices because I would define those to be compliant) but I am concerned about functionality of fields, links etc. What is the status of ACF and Accessible design?
WCAG is entirely up to the developer when it comes to the front end. For example a link field returns a URL. What you do to create the link for that URL is entirely up to you. There is nothing built into ACF that will do this for you.
For anyone keeping up with my @wp_acf adventure today I actually made some progress with "ACF Shortcake" that mashes together the functionality of Shortcake and ACF Field groups inside ACF WYSIWYG fields.