Maybe I'm missing something but that will make almost impossible controlling the layout in different ways using the same HTML tags. I understand it's easier for a developer to use that framework, but somebody that doesn't know a lot of HTML and CSS will have problems controlling the output.
You can use template's output overrides ( docs.joomla.org/Understanding_Output_Overrides ) to create your own form ( you just have to be careful to use the same names for the fields ). So you can have the layout you want. But I don't think I will add that in the extension.
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