Better related product options - allow more tiers of categories

I would like to see more options to add related products. The basic WooCommerce related products feature which I believe BodyCcommerce uses simply pulls products from the same category or same tags. That is fine on simple shops with few products but on more complex product catalogues we may want to show more closely related products. This is my real life example...

- My Shop which sells wine and related items has 1000 products.

- The top level category for most products is 'wine' but there are also top level casts of 'spirits', 'port', 'sherry' and 'gifts'

- 95% of products are from the 'wine' category

- Under 'wine' there are sub-categories: 'red', 'white', 'sparking', and then also sub-categories under those of 'country'

So at present when I set up the BC Carousel and set it to show related products, it just shows any other wine - a handful of the 950 wines available. But what I really want to do is show more closely related products. For example, if looking at a red wine I would like the related products to show other red wines (not white wines and sparking). Perhaps I might want the related products to display only red wines from the same country. At present this is not possibly as we can only display related products from the top category tier.