Well, saying it isn't new content is technically wrong. It is updated content on existing weapons. These weapons have gone through bonus enhancements via lvl 90 and 95 in hidden respects. Some feel these still aren't up to par and would like the chance to test it before it goes live to give feedback on that aspect of the content.

Personally I would rather see an option that would let current relic holders test the content by simply trading their weapon to the GM moogle and obtaining the end result rather than having to do the trail (since it is sounding like it won't be a "quick and done" thing this time). This way feed-back can be mentioned that might sway the final results a little more.

Others have good points to this too. It has happened before where something done under certain circumstances broke something else. It isn't outlandish that added "enhances X effect" might change or even break certain mechanics or that new merit adjustments might have an unexpected effect coupled with add effects. Unlikely, but not impossible.