ZC default template adds unwanted styling to our html

ZC default template adds unwanted styling to our html

We want a very simple email that allows the recipients email client settings to determine the default font-face and size.  But ZC's default template imposes a font-face of Arial and font-size of 12px, outside of the "body" space where we can enter html.  You need to remove any fixed styles outside the portion we can control.  

When we use the import option (which is not user-friendly, as it can't be edited once imported), ZC still adds it's own styling (centering a layout that was left-aligned).

These are fundamental problems that makes us wonder whether we can continue using ZC.  Other competitive tools (Mailchimp, etc.) don't have this problem.

Is there a roadmap for improving this tool?  It doesn't seem to get updated very frequently and there is little visibility to upcoming improvements.