Our Development staff would be glad to add your requests to the Wishlist, for consideration among other candidates as possible future enhancements to our existing system.
However, bear in mind that because ours is a centrally-managed system that is shared in common among the thousands of merchants subscribed to use our system, it is not possible to make a custom modification at just one merchant's request which would not also apply the very same modification to every other merchant as well, so we have to consider such requests within the context of our existing, overall development strategy.
In the meantime it is possible to at least trim down the country list by narrowing down the countries that you are willing to ship to/expect to receive orders from. On the first page under Seller Admin > Edit E-junkie Cart Shipping Settings you can CTRL+CLICK to select countries that you will ship to from the list of all available countries.