The theme is built with bootstrap 4 while visual composer it's built on top of bootstrap 3. Both version are not compatible at all since the V3 uses the floating css while the V4 uses Flex.

Most of the visual composer functionality is disabled.

Using the visual composer without a predefined row type will not work, and will result in a badly composed layout.

Some templates are using Hard coded data in it. even if the page is empty, the data will still be visible and the only way to change it is through the theme editor.

Adding content to the page text editor will not reflect on the front end only id you use a certain template.

Using template "Homepage 4" that have a overlapping menu on top of the slider will not be visible if the slider is removed.

Slider with empty buttons and link will still show the button.

Css editor in the theme option is not functional. The system will not read anything written there.

Theme option is missing a lot of sections and fields related to the website templates and your own default functionalities.