I wanted to submit this review to thank you first of all for this amazing plugin that is really time saving for any store owner.
I'm a product owner so based on my experience, I would like to suggest you the following features list to improve the plugin:
1. It'd be really helpful to exclude the product itself, so if I'm selecting product A, B and c to be cross selling to A, B and C
Product A and B will only be added to C as cross selling (exclude C)
2. Add a remove all checked products option to the plugin
3. Give the plugin two behaviors (Add or remove )
If user selects remove, this will remove cross selling items from the selected products (which can be helpful in fixing mistakes)
4. Show product SKU next to its name, or maybe make a settings page that allows users to show products by SKU or name