Use filter "Has taxonomy term ID (with depth)" for a specific field

The filter "Has taxonomy term ID (with depth)" works, but it's not possible to apply it for a certain entity reference field.

Steps to reproduce (Example)

1. Create a content type "Flight" with two fields, "field_country_origin" and "field_country_destination"
2. Create a content based view with the contextual filter "Has taxonomy term ID (with depth)"
3. Create a taxonomy vocabulary "Countries" and add some countries and states beneath them, like so:

• USA
• Kentucky
• UK
• Wales

• Node 1 - field_country_origin = Kentucky, field_country_destination = Wales
• Node 2 - field_country_origin = Wales, field_country_destination = Kentucky

Proposed Solution

Have the "with depth" option for each field. In this case, we would have the options Origin Country (field_country_origin:with_depth) and Destination Country (field_country_destination:with_depth)

I understand there are other ways to achieve what we want in this example, but this one is just illustrative. In my case I have 5 taxonomy depth levels and the query is very slow when relating through all ancestors.

Thank you.