In the Legacy Sign-Up Form, users were able to allow for multiple lists to be selected on the frontend of the form via checkbox. This allowed for subscribers to select which lists to sign up for in a single form.
The way the Acquisition Form currently functions, each form can subscribe contacts to multiple lists, but they can only be subscribed to all lists selected. Customers cannot specify which lists to subscribe to on the form.
A multi-list select capability for Acquisition Forms would be a useful addition.