In the OCS days, there was a wizard that would help move the global settings from the system container to the configuration container. That wizard does not work once the 2007 R2 schema updates are done. We need a wizard to support the current versions for doing OCS->Lync 2013 migrations
Right now, you cannot change which pool a dial-in access number is assigned to. That association can only be set when the number is added. During migrations, you often need to move numbers to a new pool from a legacy pool. This entails deleting the number, then adding it back in, changing only the assign pool. It would be nice if you could edit it in CP and set a new pool association.