They could do something like character copy, available from mog station, works like a server transfer service so to speak, but it copies your character instead?

Also, I guess to test high lvl content SE can put a system where people can create a template character specifically in test server, already geared and whatnot. Not sure how the queue is going to work if too many people create a character there lol. Purge servers with every new patch? XD

With that said, I thought SE already has internal testers or something?