I love your plugin. Great work!
But I definitely want to say, that you should change from table layout to more semantic layouts which can be styled in custom css files separately.
This would be really great, because everyone can then style the forms (e.g. responsive layout etc.).
I definitely would love to see this in your next newsletter releases.
I know it's a lot of work to restructure it again a little bit, but I think it's worth it to be prepared for future webdeveloping trends.