I too have the exact same problem. I would like to migrate from eShop to WooCommerce. However, I'd for normal posts and pages to be products also, instead of having a separate post type.
It'd be nice if WooCommerce had an option like "allow normal content to be product" which would cause normal posts or pages to be products (i.e. normal posts and pages would show the WooCommerce forms in the edit screen).