Some type of tooltip hint for this could be helpful. I was going to report the same but saw the post.
For the pack-combination, I don't see the virtual attribute to select for the "parent" combination. Or do we create it ourselves? Currently, I would create an attribute "Pack of products" and select that so customers have some information.
Also, would it be possible to show the total price of the individual combinations compared to the pack price (or is that a theme thing and indepdent of the feature)?
Still testing ...