variations table with nested options

It would be so awesome if I could choose to only list all variations of a certain attribute (for example "color" and then nested inside each row have an option dropdown where I can choose another attribute (for example "ml").
This would be useful in many cases. In my case I want to build an ecommerce site where I will sell paint and I would like to create a variable product for each brand of paint and then have all the colors and ml as variations inside the variable product.
Just like I have done here in this example on a test website I made:
https://dgrinderslev.com/index.php/product/colors-in-different-sizes/
Or you can see it on this screenshot:
View post on imgur.com

The variation table I have created in the link above is made with "WPC Grouped Product for WooCommerce", but it is not the best way to do it because it requires me to create a variable product for each color and then group them into one. There will be around 80 colors of each brand so it will be nightmare to manage if I had to build it like I have done in the example.