Good idea or bad idea? Limiting Tespia to have it?

So, the best way to implement Tespia would be simply to copy an entire server to it, and let the people play their own characters.
The temptation to use Tespia as a PS will be gone.
People will have their own characters that they know well (and would immediately recognize if a skill was changed or glitched, for example), and have nothing more exciting to do than play the new content. Those whose levels don't match the new content will do whatever they usually do, thus testing that old content hasn't been damaged by the new.

You think that wouldn't increase the amount of glitches in Tespia?