I've once done a bigger project with Visual Composer and hated every part of it. I bet the WP Community will rejoice if they get a better solution for this.
I'd love to know what the biggest issues you faced were. Easy of use (for both users and developers) is a key goal with this plugin. The decision to have portfolio and ecommerce (i.e., WooCommerce support) as separate free extensions is for this reason; not everyone needs or wants those things cluttering up the main plugin.