1) It’s possible by additional customization and changes of the CSS styles.
2) Our theme has 2 custom tabs: 1 common for all the products (Theme Options > E-Commerce > Single Product > Custom Tab) and 1 separate for the every product (Products > Edit your product > scroll dow to the 8theme Layout Options area > Custom Tab). If you need more than 2 custom tabs you can do this only by additional customization.
Use child theme for all the types of the additional customization.
If you need help with customization you can submit request here https://wpkraken.io/?ref=8theme
Thank you 2 tabs should be more than enough. So far I’m really amazed by the flexibility of your theme.
One quick question, please take a look at the screenshot http://imgur.com/a/9NAiA
How can I change the word DESCRIPTION to the wording of my choice?