It kind of depends on what the test server’s purpose is for. If it is for new content R9 and beyond, it will be better to allow copying of existing Teams from the official servers to the test server. Everytime the test server gets new patches/maintenance, the teams will be wiped and every tester will have to copy their team over again.
This allows for many degrees of testing with higher droprates and also prevents ‘opportunists’ from treating the test server just like any other server and not playing on the official servers.