Maropost Forms are not mobile-friendly, which greatly minimize the value of the feature as a whole, given the widespread use of mobile devices on the internet.
Please update the HTML output by the forms engine to responsive HTML.
We are actually going to be upgrading Forms with a drag-and-drop editor very similar to that of Landing Pages.
As a matter of fact, you can present create a Landing Page with that references a Maropost sign-up form. This process will enable you to create a nice landing page that has responsive-design encoding built in that also includes a Maropost signup form. I believe that your Client Success Director already showed you how. If I am mistaken, please reach out to him and he'll show you how easy it is to do so.
Vice President - Product and Client Success
Maropost Marketing Cloud
Thank you for your response. I am looking forward to the improvement.