Shipping flexibility – assign one Country into several Zones

It would be nice to assign one country into several zones. This could save a lot of energy when dealing with more shipping companies with different zoning. For example shipping company A uses 7 zones for the whole world and shipping company B uses 11 zones for the whole world. Of course you will have a lot of countries in different zones and for completely different prices (difference sometime more than 100%).
My idea was to create zones for every shipping company (like FedEx A, FedEx B, FedEx C,… DHL A, DHL B, DHL C,…) and set the countries for the respective shipping company zone. This means that for example France can be in FedEx C and also in DHL A.
Now to achieve this in Prestashop you should have so many Zones as Countries and that is not very handy. Especially when you need to do shipping price changes.