The solution to all this is to do a rollback before this patch content. Remove all the new content, and compensate those who have purchased items via blood points, mastery points, or kafra. I know this would take a while to complete server wide for compensation, but this is a must. There has already been a decline in Ro2 population, and I believe this will be the last straw where the remaining will decide to stay or quit.
Just to reiterate, yes we do need a testing team for the new content. I feel that Gravity tends to push content out too soon. WP team, no matter how hard they work, they are always playing a catch up game with fixing bugs and pushing out new content.
There are other MMORPGs that have seen pitfalls but recovered once the developers started listening to the community. I realize this is a F2P game, but there are players who still purchase kafra points. If this trend tends to continue I fear that Gravity will lose more of their revenue when those players quit the game.