When creating an export or synchronisation of products to eBay you can either select categories or individual products.
If selecting by product then you can apply a filter to subset the products to be listed using the product grid.
However, If you select a category it will export everything in that category.
It would be very useful to be able to add conditions to the category selection.
That way you can add new products to the category and the condition will still select only those relevant products automatically.
For example, a category has products that need two different shipping policies on eBay.
You could then create two exports for the same category, each with a different weight based shipping policy.
New products can then be added to the category without the need to edit the export product list, and they will be exported to eBay.