As a Marketer who considers an audience that may be visually impaired, and may actually be required to comply with an Accessibility standard by law, I need my forms to contain attributes that align with screen readers.
Today Legacy Signup Forms and Acquisition forms don't automatically allow for setting of certain attributes like Label>For, Legend tags, or autocomplete.
Certainly it is possible to manually add these attributes to the HTML prior to embedding on my external web page but:
-it would be much easier if the generated form HTML code for Legacy Signup Forms and Acquisition Forms just automatically contained compliance related attributes
-Acquisition Builder has actions to display Acquisition Forms, and because the form code itself doesn't contain those accessibility compliant attributes, manually adding those attributes after the form is displayed would require additional scripting on the page to inject those attributes, and some screen readers may not align with that method either as they may not be able to read the Javascript.
A great reference to how to make forms accessible can be found here:
https://webaim.org/techniques/forms/controls