Imho porting from a region to another should be allowed but with some limitations:

1) it should be ingots only

2) you shouldn't be able to ask for more than 1 port per year but you should be granted the option to eventually revert back to your original server.

3) the port has to be limited to servers not younger nor older than 1 week in comparison with your original server (basically going from server 302 in uk to server 303 in hk is fine, going from server 1 to server 1020 no)